jerknuts Share definition Flag (noun) Someone lacking intelligence and/ or failing to pay attention. Dismissive. That asshole with the blinker on for the last 6 blocks is a fuckin' jerknuts! -or- Frank Rizzo: "Way to go there, Jerknuts!" jerknuts by Pete D April 27, 2006 0 0 Get merch Get the jerknuts mug. Buy Now — $32.95 See more merch