boo-ack Share definition Flag To throw up so hard you sound like you are saying "booo aaack" Le Brum boo-acked so early this morning after last nights party. Don't boo-ack on my shoe please. boo-ack by Henway May 1, 2006 0 0 Get merch Get the boo-ack mug. Buy Now — $32.95 See more merch
