The word bof has long been French slang for indifference, a verbal shrug used when something is neither good nor bad, just unremarkable. This particular clip is identified from a Radio Nova segment in the Les 30 Glorieuses series, titled Salut les Beaufs, in which Benjamin Trani talks about a recent romantic dinner. Online, short reaction sounds like this travel easily because they need no translation for tone, even when the word itself is French. Creators keep using it as a quick, dry reply to anything underwhelming, from disappointing food to anticlimactic news.