can't be serious

idiom
Updated on: 15 Nov 2017

Definition of can't be serious

used to express disbelief about what someone said
  • "I'm joining the army." "You can't be serious."

Word by Word Definitions

can't play
  1. : can not

serious play
  1. : thoughtful or subdued in appearance or manner : sober

  2. : requiring much thought or work

  3. : of or relating to a matter of importance


Seen and Heard

What made you want to look up can't be serious? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!