Beak Share definition Flag Slang for Cocaine. Also Llello(Yeyo), Charlie, White, Posh and Ching. " Sorry about kickin off over 'how many nipples dogs have' before, it was the Beak, I'm doin' too much recently " Beak by John Gaskell March 7, 2004 0 0 Get merch Get the Beak mug. Buy Now — $32.95 See more merch