反抗期ぶってるクラスメイトがくそださい話

What does the Japanese suffix ぶる mean?

The whole clip is a takedown of a classmate who’s decided acting rebellious is cool — talking back to teachers, refusing to bring his textbook — and the title nails exactly why it reads as fake: 反抗期ぶってる, “putting on the airs of being in his rebellious phase,” rather than actually going through one. ぶる attaches to a noun and always implies performance: the person isn’t just being X, they’re visibly playing the part of X for an audience.

The same pattern shows up in いい子ぶる (playing the good kid, usually to gain favor) and 知ったかぶる (acting like a know-it-all) — in every case, ぶる carries a critical edge, calling out the gap between how someone acts and what they actually are. It’s an N1-level pattern precisely because it does something native speakers do constantly and instinctively: flag insincerity in a single suffix. In the clip, classmates and even the teacher line up to say so directly — that the “rebellion” is a costume, not a phase.