blahcasm Share definition Flag Talking a lot, in a sarcastic way. You can keep up whole conversations like this. "His blahcasm was really pissing me off" "Don't you being blahcastic wit me, fool!" blahcasm by lukej369 April 11, 2004 0 0 Get merch Get the blahcasm mug. Buy Now — $32.95 See more merch
