schnook
1. slang A foolish, gullible person; a pushover. From Yiddish. I can't believe you convinced that schnook to transfer his entire life savings into your account! I felt like such a schnook after falling for their prank.
2. slang An utterly worthless or insignificant person; a loser. From Yiddish. Mary's new boyfriend is a total schnook. He couldn't even finish his associate's degree! She's always been a bit of a schnook, just coasting by in life with no real ambition.