Meaning/Usage: Used when someone has nothing to say
Explanation: One explanation is that a long time ago, a witches cat would steal the tongue of a person to prevent them from telling others. However, this is only a tale and there are many guesses where this idiomatic phrase came from. Regardless, it is frequently used by someone who has the upper hand in a conversation. If a person cannot counter, or has nothing to say, then the other person can ask "don't you have anything to say?" or "Cat got your tongue?"