Shmuck Share definition Flag An insult to imply someone is useless (as the removed foreskin). Usually more descriptive of the user than the subject. This shmuck just totally cut in line in front of me. Doesn't he know I need my Starbucks? Shmuck by Princess Stinkypants May 27, 2016 0 0 Get merch Get the Shmuck mug. Buy Now — $32.95 See more merch