peanust Share definition Flag Peanust meaning an unintelligent person that can't follow directions and is absurdly annoying Person 1: Have you heard of Billy Person 2: No Person 1: Yeah don't talk to him, he's a Peanust peanust by TerrorFuckingMaxima November 16, 2020 0 0 Get merch Get the peanust mug. Buy Now — $32.95 See more merch