While schmuck is considered an obscene phrase in Yiddish, it has grown to be a common American idiom for "jerk" or "idiot". It may be taken as offensive, on the other hand, by some Jews, especially People with powerful Yiddish roots. They performed right before a group of 2500 folks.[1] http://ichliebehaustier.de/schmuck-verkaufen-ein-leitfaden-fur-den-erfolgreichen-verkauf-von-schmuckstucken/