The phrase comes from Brazilian League of Legends streaming culture, where Kami, a well known former pro mid laner, is a frequent target for Katarina jokes. Written in shortened Portuguese as 'vc n sabe jogar de kat,' it translates to you do not know how to play Katarina. The clip is associated with YoDa, another Brazilian ex-pro turned streamer known for loud callouts. Shared on soundboards and in Discord chats, it survives as a quick way to mock a bad Katarina pick without typing the insult out.