poisson croissant Share definition Flag Referring to an unpleasant French person. Phonetically read as pwa son qwa son. You're being a total poisson croissant right now. Let's get our baguette and just leave. poisson croissant by crabcrabcrab🦀 January 22, 2021 0 0 Get merch Get the poisson croissant mug. Buy Now — $32.95 See more merch