COWSHMUCK Share definition Flag a medium to large woman who is nasty, like a cow, and is a bitch at the same time. A mean fat girl. Cockblocker. (COW-SHMUCK) "Hey COWSHMUCK, quit cockblocking and fuck my skinny friend." COWSHMUCK by ERIC WEST April 5, 2008 0 0 Get merch Get the COWSHMUCK mug. Buy Now — $32.95 See more merch