Kosher

Right, Honest: It don't sound kosher to me.

Nosh

To eat a little something: I was noshing all day.

Cockamammie

Crazy: He's got cockamammie ideas.

Futz

To fiddle around; Geting your PC to work.

Chutzpah

Guts, Nerve, no Shame : He has chutzpah.

Gelt

Money: I got a lot of gelt for Chanukah.

Goyim

Non-Jewish people: The place was full of goyim.

Ganif

Thief: Don't be such a ganif

Kvetch

Complainer: Don't be such a kvetch.

Miskayt

Ugly: The daughter is a reall meeskite.

Mensch

A nice gentleman: He was such a mensch.

Mishegas

Craziness: What kind of mishegas is that?

Nebish

Little nerd: He is such a nebish.

Shlemazel

Unlucky person: The poor schlemazel had his car stolen.

Shmatas

Rags: Your clothes look like shmatas.

Shpilkes

Nervous energy: I had shpilkes before the interview.

Shtick

Routine: That's his shtick.

Kvel

To glow with pride: I could kvell watching those kids in the play.

Mazel

Luck: I got such a mazel.

Shlemiel

Fool: He's a real schlemiel, always screwing up.

Schmootz

Dirt: It's covered with schmootz.

Tsures

Troubles: That car gives me nothing but tsures.

Tsimmes

Fuss, Issue: She made a big tsimmes out of it.

Bupkis

Nothing:  I got bupkis for my bonus.