it's to laugh

it's to laugh

It is totally ridiculous; it is laughable. Wait till you hear her ludicrous excuse—it's to laugh.
See also: laugh
Farlex Dictionary of Idioms.

it's to laugh

Also, it is to laugh. It is absurd, laughable, as in You think the trial will be over in a week-it's to laugh! This expression is usually put as an exclamation, as in the example. [Second half of 1900s]
See also: laugh
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • for a laugh
  • good for a laugh
  • raise a laugh
  • raise a laugh/smile
  • be laughing
  • laugh until you cry
  • laugh yourself silly
  • laugh (oneself) silly
  • laugh oneself silly
  • chortle
References in periodicals archive
"If he gets hit with the ball his reaction is not, "Ouch, that's sore", it's to laugh. That's what gets him going, I guess, weird things like that.
MURRAY BULLIED; TENNIS