nebbish
One who is fearful, indecisive and timid, especially in making decisions and plans, in discussions, debates, arguments, and confrontations, and in taking responsibility.
Actor Rick Moranis often plays a nebbish.
Where it comes from
From American Yiddish נעביש (nebish), from נעבעך (nebekh, “poor, unfortunate”).
Adapted from the Wiktionary entry nebbish (CC BY-SA 4.0).