be no laughing matter

be no laughing matter

To be a serious and important topic or situation. Your grades are no laughing matter. Unless you want to repeat the ninth grade, you need to start studying.
See also: laugh, matter, no
Farlex Dictionary of Idioms.
See also:
  • sleeve
  • bust out laughing
  • be laughing up (one's) sleeve
  • be laughing up your sleeve
  • burst out laughing
  • rolling on the floor laughing
  • be laughing (one's) head off
  • be laughing your head off
  • laughing in the aisles
References in periodicals archive
Jewell's boys face Michael Owen and Newcastle today - and it's bound to be no laughing matter for Graeme Souness.