I do not believe you; you are joking.

present participle of tell tales out of school

Alternative form of tell its own tale.

Alternative form of dead men tell no tales

Alternative form of you can't judge a book by its cover

A sarcastic response to when someone is told something obvious

(informal, vulgar) To tell someone an obvious lie.

Full name of the U.S. Military's "don't ask, don't tell" policy concerning the service of homosexuals in the military as defined in 10 USC § 654.