paisura パイスラ

In Japanese, pi slash (π/), paisurasshu パイスラッシュ, or just paisura パイスラ, is when a strap of a backpack or something similar crosses (slashes) a girl's chest diagonally, emphasizing her oppai おっぱい, "breasts."

Character: Oriotorai Makiko オリオトライ・真喜子
Anime: Kyoukaisen-jou no Horizon, 境界線上のホライゾン (Episode 1)

• Examples
• References

Examples

Straps of weapons, like quivers of arrows, guns, also count, as do seat belts, and so on, so long as they cross between the breasts.

Character: Kyoudou Maya 経堂麻耶
Anime: Sabage-bu'! さばげぶっ! (Episode 2)

がんばれ！朝の女子高生

References

• π/ - dic.pixiv.net, accessed 2020-01-19.