It's a Yiddish (Jewish slang) expression meaning a stupid person.
In the past, (Yiddish, Germany) it was an explevtive meaning, Butt-Hole,
just as, Putz, meant Penis.
With todays youth it's the same as saying;
Your being a schmuck (butt-hole) you Putz (dick)
of course the other word for butt with an A _ _ is more vulgar way of taking the insult.
Peter Schmuck's birth name is Peter Gilray Schmuck.
Uta Schmuck was born in 1949.
Christina Schmuck was born in 1944.
Elmer N. Schmuck died in 1936.
Peter Schmuck was born on August 9, 1955.
Peter Schmuck was born on August 9, 1955.
Marcus Schmuck was born on April 18, 1925.
Marcus Schmuck was born on April 18, 1925.
Elmer N. Schmuck was born in 1882.
Udo Schmuck was born on 1952-10-29.
Donald Schmuck died on 2004-01-24.
Donald Schmuck was born on 1915-08-16.