kacafiniss Share definition Flag (adj.): being rude and boisterous; an unknown adjective used to describe something in a awkward situation. You are a kacafiniss.Man, that party was kacafiniss last night. kacafiniss by kathleeniewithavattheend December 15, 2012 0 0 Get merch Get the kacafiniss mug. Buy Now — $32.95 See more merch