While schmuck is considered an obscene expression in Yiddish, it happens to be a standard American idiom for "jerk" or "fool". It can be taken as offensive, having said that, by some Jews, specially These with strong Yiddish roots. They have been trying to find a winter sport to play http://ichliebehaustier.de/schmuck-verkaufen-ein-leitfaden-fur-den-erfolgreichen-verkauf-von-schmuckstucken/