- Schmuck is a Yiddish word for a jerk or for a foolish or contemptible person.
A loud obnoxious guy who everyone dislikes and makes fun of is an example of a schmuck.
schmuck definition by Webster's New World
Origin: eastern; English Yiddish shmok, literally , penis ; from Old Polish smok, grass snake, dragon
schmuck definition by American Heritage Dictionary
also shmucknoun Slang
Origin: Yiddish shmok, penis, fool, probably from Polish smok, serpent, tail.