cowcrap Share definition Flag Slang. Noun: nonsense, unbelievable. Euphemism of bullshit. Espon: I saw a dinosaur the other night in my backyard. Mina: What? I don't believe that. Mari: Yeah, that's cowcrap. cowcrap by Esperine June 11, 2006 0 0 Get merch Get the cowcrap mug. Buy Now — $32.95 See more merch