I'm not sure if this joke will work in written form. I've only heard it verbally. You'll have to say the punch line out loud to get it, I think. Even then, you'll have to be quite a Jew to get the joke.
"What did the bank robber say when he robbed a bank in Mea Shearim? He said, "Gimme loot, Chasidim!"
That joke courtesy of Josh Weinberg, my JHist teacher.
You may groan now.