from Wiktionary, Creative Commons Attribution/Share-Alike License

  • interj. The sound of a cat coughing up a hairball.
  • interj. Also used of similar noises, particularly one made to show disgust or disapproval.
  • v. To make a 'gack' noise.
  • v. To expectorate a hairball.


Apparently from the sound made; believed to have first appeared in comic strips. (Wiktionary)


Wordnik is becoming a not-for-profit! Read our announcement here.


Log in or sign up to get involved in the conversation. It's quick and easy.