Tell me another!

tell me another

A sarcastic comment said when one does not believe or is skeptical of what someone is telling them. The expression treats what was said as a joke, i.e., it was so untrue or unlikely that it was funny. You're actually going to be on time tonight? Oh, sure, tell me another! You were at the library? Tell me another!
See also: another, tell
Farlex Dictionary of Idioms.

Tell me another !

verb
See Tell me another one!
See also: tell
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • tell me another
  • tell me another one
  • Tell me another one!
  • sucks to be you
  • let's not and say (that) we did
  • You call this (something)?
  • (hardy) har har
  • promises, promises
  • not going to win any beauty contests
  • sarcasm is the lowest form of wit