"A knipl is a secret stash of cash and a pekl is a bundle or, in current parlance, a go-bag. Together they’re the secret door when the exits are locked, barred, or too frightening to approach." (source)

"One person in the group recently described helping her father, a university professor, move to a new apartment a number of years ago, and suddenly discovering a bag of cash. 'What’s this about?' she asked him. 'As a Jew,' he said, 'one always needed a knipl and a pekl for a fast getaway.'" (source)