A polite refusal by someone who has just done a magic trick to reveal how it works. / (by extension) A refusal to explain how one accomplished something impressive.

Bad people often prosper unfairly, because the devil helps them.

A culture-bound syndrome of lovesickness and depression, mostly associated with the Mohave American Indians.

(informal) A person with whom one has only a very casual and superficial friendship.

plural of hi-bye friend

One can never be sure of one's paternity.

Cooking food for a man is a good way to win his affections.

It is not the tools we use that make us good, but rather how we employ them. / Upon failure, it is easier to blame the tools used rather than how they were employed.

Alternative form of every dog has its day

Each person is the chief cause of their success or failure in life.