The phrase translates from French as a big mental problem, and the clip is associated with French comedian and creator Mister V, whose deadpan humour made the line easy to reuse out of context. Shared through soundboards and short-form video edits, it became a shorthand reaction for behaviour that seems completely irrational, without needing subtitles or explanation for viewers who recognise the tone. Its brevity is part of its staying power: at barely over a second long, it can punctuate a joke, close a failed attempt or answer an absurd statement without slowing the edit down.