Definition of "gack" [gack]

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

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• "If any one sings to him gi ga gack, he responds invariably _gack_."
• "I like David's "gack" all I could think of was having a hairball caught in my throat.....don't ask!"
• "Highlights included: being told that the house has a nice feel to it, you know, cosy-like performing mini-survey on gut response to caribbean colour scheme (there were a few 'gack's, and a quiet few paid it compliments) meeting many new and interesting people who live here (the computery to non-computery ratio was still a little one-sided for my liking, but at least many people were fighting for my digital rights) a special guest star all the way from Sacramento home-baked cupcakes (!)"