Alternative form of hand, foot and mouth disease.

(idiomatic) To misspeak, to say something embarrassing or wrong, or to make a mistake in public, or a social blunder, that is embarrassing or offensive.

(idiomatic) born rich, or into a wealthy family

One should not unappreciatively question or inspect a gift too closely.

Alternative form of don't look a gift horse in the mouth

(rhetorical question, informal, sarcastic) Used to indicate that the other person's speech has become too obscene or vulgar.

(idiomatic) To give one an unpleasant feeling or memory.

Alternative form of butter wouldn't melt in someone's mouth

Alternative form of butter wouldn't melt in someone's mouth

(idiomatic) The identified person appears to be benign, mild-mannered, or calm (but with an integral suggestion that, to the contrary, he or she really is untrustworthy, disagreeable, or mean-spirited).