BT (biàn tài) — Weirdo / pervert / freak — abbreviation of...

Weirdo / pervert / freak — abbreviation of 变态 (biàn tài), literally "changed state" or "abnormal." Used to call someone a pervert, a weirdo, or just someone behaving strangely. Can be affectionate between friends or genuinely insulting depending on context.

Example Usage

你这个BT！怎么想出这种办法的？

You weirdo! How did you even come up with that idea?

Cultural Context

变态 in Chinese covers everything from "sexual pervert" (the strong sense) to "this person is so weird and creative" (the mild, friendly sense). Among close friends it's often used affectionately — like calling someone a freak for doing something unexpectedly clever or bizarre. In Japanese pop culture (which heavily influences Chinese internet culture), 変態 (hentai) carries the same range.

Category: internet-culture