In Japanese, OL means a woman who works an office job, it's an abbreviation of "office lady," and includes anything from pencil-pushers, to managers, CEOs, etc. It's not a specific profession. OL is the female counterpart of salaryman.

Sometimes, OL is translated to English as "secretary" due to stereotypes about working women.

OL is pronounced oo-eru オーエル.

See: katakanized alphabet letters.

• Meaning
  • "Secretary" Translation
  • Origin
• Tropes
  • Office Romance
  • Role Reversal
  • Sexual Harassment
  • Train Molester
  • Girls-Only After-Work Drinking Party
  • Uniform Fetishism
  • Cute Ladies Doing Office Things
• References

An OAD, or ODA, is an anime bundled as a bonus disc into a limited edition manga volume that never aired on TV or anywhere else.

• Definition
• Acronym
• OAD vs. OVA
• References

On the internet, orz (or OTL, OTZ, szo, among others) is a pose: someone on all fours, fallen on their knees with their hands on the floor. It's used when someone feels defeated, dejected or hopeless about something.

• In Japanese
• Examples
  • Spotlight
• Similar Poses
• References

In Japanese, W means "double," daburu ダブル, when used as a prefix, e.g. a daburu deeto Ｗ（ダブル）デート means a "double date." This happens because W is pronounced as "double u," daburyuu ダブリュー, which sounds like double.

See also: katakanized alphabet letters.

• Context: Minakami Mai 水上麻衣 greets Aioi Yuuko 相生祐子.
• a, Yuuko, ohayoo
  あ　ゆっこおはよー
  Ah, Yuuko, good morning.
• W-megane!!!
  Ｗ（ダブル）メガネ！！！
  Double glasses!!!

Not to be confused with wwww, which means "lol" instead, just like kusa 草.

• Examples

Since I've posted a bunch of these already, here's a list of Japanese words containing English (Latin) alphabet letters, and the respective posts which talked about them. (in no particular order)

Some of these are wasei-eigo, meaning they're made up in Japan but out of English words. Some of these are abbreviations used in English too which I included because why not.

Note that since these terms are used in Japanese, the letters are pronounced in Japanese too. See katakanized English letters for how to pronounce them.

OVA
Original Video Animation. (wasei-eigo.)
Anime that's originally sold on VHS, videotape, discs, instead of airing on TV.

ONA
Original Net Animation. (wasei-eigo.)
Anime originally streamed instead.

OAD
Original Animation Disc. (wasei-eigo.)
Anime originally bundled with manga volumes as a bonus disc.

NEET (niito ニート)
Not in Employment, Education or Training.
(not wasei-eigo, but used mostly in Japan, originally from UK, it seems.)

NG. (enujii エヌジー)
Not Good. (wasei-eigo.)
(can't air on TV, "triggers me," etc.)

In Japanese, TG would be the abbreviation of "transgender," katakanized toransujendaa トランスジェンダー. The letters TG are pronounced as thii-jii ティージー.

TS is the abbreviation of "transsexual," katakanized toransusekusharu トランスセクシャル. TS is pronounced thii-esu ティーエス.

TSF is the abbreviation of "transsexual fiction" or "transsexual fantasy," a genre that includes gender-bender and the sort. TSF is pronounced thii-esu-efu ティーエスエフ.

In Japanese, NTR is an abbreviation for netorare 寝取られ or netori 寝取り.

• shitteru...
  知ってる･･･
  [I] know.
• anaga ga taburakashita
  あなたがたぶらかした
  You seduced [her].
• karada de
  体で
  With [your] body.
• netorare
  ＮＴＲ
  The act of having one's lover taken by someone else. (literally.)
  You're taking her from me. (in this context.)
• nn!?
  んん！？
  Hmmm!?

Besides NTR, the abbreviations NTL, NTRR, and NTRS also exist.

In Japanese, do-emu ドＭ, meaning literally "super masochistic," generally refers to a romantic personality type, which is different from what the word "masochist" means in English, and less often refers to someone who derives pleasure from pain, which is what masochist means in English.

• Personality Type
• Terminology
• ドＭホイホイ

In Japanese, do-S ドＳ, "super sadistic," may refer to a romantic personality type, may be a complaint about someone who likes to boss people around, or may refer to someone who is a sadist in the S&M sense.

• Meaning
  
  • Personality Type
  • Complaint
  • S&M
• Vocabulary

In Japanese, the letters QK mean a "pause" or "break" to rest. A "recess." It comes from the Japanese word kyuukei 休憩, which, as you'd expect, mean exactly those same things.

The reason why QK in Japanese is kyuukei is that the names of the letters Q and K in English are "cue" and "kay." When "cue" and "kay" are katakanized, they become kyuu キュー and kei ケイ. So the letters are read as kyuu Q, kei K, kyuukei QK.

This can also be seen in the word ecchi エッチ, which is sometimes represented by the letter H in Japanese.

In Japanese, the letter H stands for the word ecchi エッチ, and it means something along the lines of "sex," "sexy," "sexual," or even a bit "sexually perverted."

• Context: a girl doesn't like her uniform.
• nani itteru no yo
  なに言ってるのよ
  What are [you] saying?!
• konna ecchi na fuku wo
  kiseru tsumori!?
  こんなＨな服着せるつもり！？
  [You] intend to make [us] wear such perverted clothing!?
• senaka wa konna ni deteru shi!
  背中はこんなに出てるし！
  The back is getting out this much!
• It's this much exposed!
• sukaato wa chou mijikai shi!!
  スカートは超短いし！！
  The skirt is super short!!

So the name of the manga and anime B-gata H-kei B型H系, for example, would mean "[blood] type B, perverted (ecchi) type [of character]." (in this case, B-gata refers to a superstition about personality, where people with type B blood are creative and cheerful, but irresponsible and impatient)

As for why H means ecchi, it's because the name of the letter H in English is "aitch." And when "aitch" is katakanized, it becomes ecchi.

It's originally the reverse: the word ecchi is the one that comes from the letter H. And it comes from the letter H because it's the first letter in the romaji of the word hentai 変態, which's used to call someone a "pervert," among other things.

In Japanese, おｋ means "ok" in Japanese, ok?

It's read oke おけ or ookee おーけー, ok?

It`s like up うｐ, ok?

• Nihongo de ok
• "Okay" in Japanese

In Japanese, うｐ is an internet slang meaning "upload."^{(dic.pixiv.net)} This weird mixture of Japanese and Latin characters occur because typing up in the computer converts the u romaji to the u う kana, but there's no kana that's only the p consonant, so it becomes うｐ.

In Japanese, a sequence of w's written at the end of a sentence in an internet comment (w, ww, www, wwww, and so on) is a slang like "lol," "lmao," or "rofl" in English. In manga and anime, it's particularly used by internet troll characters, and otaku, leaving snarky comments and starting flame wars.

In Japanese, JK means Joshi Kousei 女子高生, "high school girl," or it can mean JouKou 常考, which translates to "obviously." In both cases, JK is a slang.

In Japanese, "ＮＧ" means something "is not permitted," that it "is not okay," that it is "censored," or that someone "can't handle" something.

It's pronounced enu-jii エヌジー.

See also: Alphabet Letters in Katakana.

• Meaning
• Examples
  • ＮＧワード
  • 顔出しＮＧ

In Japanese, BL is a genre of gay fiction, specially manga, anime, and doujinshi 同人誌 that focus on a gay romantic or sexual relationship and targets a female audience (e.g. shoujo 少女), as opposed to bara 薔薇, that targets a male, gay audience. An erotic, plot-less sub-genre is yaoi やおい. Rarely, it means "to be gay" instead. BL is an acronym standing for "Boys' Love," booizu rabu ボーイズラブ. It's pronounced bii-eru びーえる.

An ONA is an anime that was released first through the internet, streamed through some service, as opposed to having first aired on TV, or being first distributed as physical media (DVDs, BDs.)

An OAV is an anime that was first made available through physical copies, that is, on discs, DVDs, Blu-rays, as opposed to having first aired on TV. The term stands for "Original Animation Video."

It's literally the same thing as OVA, Original Video Animation. The term OVA is more common than OAV, specially in Japan, probably because "AV" without the "O" normally means "adult video"—i.e. a "pornographic video"—in Japanese.

See the article about OVA for details.

An OVA is an anime that was released first as physical copies, that is, on discs, DVDs, Blu-rays, as opposed to having first aired on TV. This includes both whole series first sold as discs, as well as bonus episodes that never aired on TV but on blu-rays containing episodes that did air on TV.

In English, "straight-to-video" or "direct-to-video" are similar terms, but OVA refers to animation specifically.