If you cross the picket line
You’re a schmuck.
If you cross the picket line
You’re a putz.
If you cross the picket line
You’re a schnuck.

definitions:
schmuck: (yiddish) fool.
putz: (yiddish) jerk.
schnuck: 1. (yiddish) customer easily fooled; sucker. 2. (n. pl. schnucks) grocery store chain based out of st. louis, missouri.