Top definition
Person: Did you know that Marilyn Manson loves gacking?
Another person: No way!!
Person: Really? Of all the things he's into, THIS, surprises you? Wow. I'm tweeting this convo, ya twat!
by KingFobos March 22, 2016
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Jul 1 Word of the Day
It's the sweat that accumilates under big boobs
It was so hot outside that I had mass amounts of boob sweat.
by Tiffany2583 January 05, 2007
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2
Throwing up vigorously and loudly. It's worse than yacking.
Upon learning that she could get pregnant by swallowing sperm, she began instantly gacking on her new shoes.
by RBV and Ice February 04, 2016
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3
When your cat gets a random huge energy burst and runs around the house jumping on stuff and knocking things over like a little shit head.
I didn't get much sleep cause my cat was gacking all night.
by Friendlytoad May 19, 2016
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