The sound a person makes when deep-throating a cock, or when having their throat fucked.
"How you doing down there?"
"Guck guck guck guck guck..."
by Wolfgang von Snowden September 13, 2022
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Only the best of blowjobs that end with the most orgasmic finish
Kyle: “dude jade gave me that guck guck 9000 last night and damnnn

Or
Lexi: “I gave Kyle that guck guck 9000 last night and he couldn’t even move”
by Milkycunt69 October 23, 2019
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