Someone who has been dumb and you don’t like them any more.
Dude1: *trips over a table*
Dude2: ha watta shmuck
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?
get ur penis sucked from a very old person with no teeth
man:girl take out your dentures lemme get my meat shmucked
to make a PB&J using a dead fetus as the jam and your own shit as the jelly
“Bro i’m so hungry right now, I for real need to start shmucking”
someone who’s a dickhead all the time
“aye shut up you flippin shmuck-head”