ick-ack Share definition Flag taken from bill the cat from bloom county, meaning whatever you want it to mean. "it smells like like ick-ack in here." "that girl's ass is fuckin ick-ack after who she's been with." ick-ack by Kineticon November 13, 2004 0 0 Get merch Get the ick-ack mug. Buy Now — $32.95 See more merch