A Jew Fold is when you take money, or another valuable piece of paper, and fold it in such a way that it looks like you have more than you actually do. Usually this requires intricate folding techniques to make it look legit. Only a true Jew can master the Jew Fold!
"Damn look at this picture Mark posted. He's got bank!"
"Nah man, he's just using a Jew Fold. Look, you can even see the folds in the cash."