laughing matter

no laughing matter

A very serious topic or situation; something that should not be treated lightly or as funny in any way. Boys, this is no laughing matter. One of you could have been seriously hurt. Termites are no laughing matter. They've been known to destroy entire homes.
See also: laugh, matter, no
Farlex Dictionary of Idioms.

laughing matter

see under no joke.
See also: laugh, matter
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • be no laughing matter
  • it's not funny
  • it isn't funny
  • sleeve
  • be laughing up (one's) sleeve
  • be laughing up your sleeve
  • laugh about
  • laugh about (something)
  • LMAO
  • PMSL
References in classic literature
For let me tell you, Socrates, that when a man thinks himself to be near death, fears and cares enter into his mind which he never had before; the tales of a world below and the punishment which is exacted there of deeds done here were once a laughing matter to him, but now he is tormented with the thought that they may be true: either from the weakness of age, or because he is now drawing nearer to that other place, he has a clearer view of these things; suspicions and alarms crowd thickly upon him, and he begins to reflect and consider what wrongs he has done to others.
It was no laughing matter with Estella now, nor was she summoning these remembrances from any shallow place.
This enraged Honour, and she cried, "Indeed, madam, I did not think your ladyship would have made a laughing matter of it.
"And see whether HE thinks it a laughing matter, too." With that parting shot, my daughter left me.
Such, in short, was the end of the adventure of the Distressed Duenna, which gave the duke and duchess laughing matter not only for the time being, but for all their lives, and Sancho something to talk about for ages, if he lived so long; but Don Quixote, coming close to his ear, said to him, "Sancho, as you would have us believe what you saw in heaven, I require you to believe me as to what I saw in the cave of Montesinos; I say no more."
Little John could not forbear laughing heartily at the scene, though he knew that 'twould be anything but a laughing matter if Will should stumble.
"Don't laugh, my friend!" cried D'Artagnan; "for heaven's sake, don't laugh, for upon my soul, it's no laughing matter!"
“It is no laughing matter, let me tell you, sir; the forty dollars of bounty and your six months of salary will be much reduced before you can get the matter fairly settled.
As Teresa truly said, it was no laughing matter. But the point is that Miss Lavish was positively ATTRACTED by his mentioning S., and said she liked plain speaking, and meeting different grades of thought.
I laughed, but she said, 'I'm no sure that it's a laughing matter,' and afterwards, 'I would have liked fine to be that Gladstone's mother.'
"Oh, you may laugh, doctor, dear, but it would be no laughing matter."
"Honoured sir, honoured sir," cried Marmeladov recovering himself-- "Oh, sir, perhaps all this seems a laughing matter to you, as it does to others, and perhaps I am only worrying you with the stupidity of all the trivial details of my home life, but it is not a laughing matter to me.
There came a day when the rain fell in torrents; and it being December, to be wet with it and have to sit all day long in one of the cold cellars of Brown's was no laughing matter. Ona was a working girl, and did not own waterproofs and such things, and so Jurgis took her and put her on the streetcar.
"This is no laughing matter." She paced the room excitedly.
Catherine and Isabella were sitting in the library, on hostile terms, but silent: the latter alarmed at her recent indiscretion, and the disclosure she had made of her secret feelings in a transient fit of passion; the former, on mature consideration, really offended with her companion; and, if she laughed again at her pertness, inclined to make it no laughing matter to her.