A phrase most commonly stated after a particularly clever comment, ex: a pun, a dis, in rare cases a well placed "your mom" or "so's your face" or "That's what she
said."
It is often associated with a third
party, having heard said clever comment in another's conversation.
Used in place of other put down-ish phrases, such as, "You just got served" or "Oh
snap!" or "PWNED!" etc.