When your girl...or guy(it is 2017)...gags on your dick
I don't care that Kaia is his girlfriend. Imma gack Dylan tonight at 12:04.
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To get messed up in the process of putting the team on your back and still going out like a champ.
His night would have been better if he hadn't Gacked after the race.
by bww13 December 6, 2010
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Gack is not a word but an emotion of pain and joy. And also a good word to say after dabbing on the haters
by Joebo kenysville February 19, 2019
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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 4, 2016
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In certain social groups, it's come to mean "to kill violenty". Typically by means of strangulation. It can also mean being shot from time to time but the latter is it's more common use. Either way, to be 'gacked' means to be killed violently and or by surprise. But strangely, is almost always used in jest or a playful nature.
"im gonna gack you, if you keep fucking around with me." (Non-serious tone)
by WeeLilFaggot February 27, 2020
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Come on lets go and buy a big bag of gack
by tomo April 26, 2004
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v. - to steal, snatch, grab, or otherwise take something into one's possession
I was thirsty, so I gacked a Coke from his fridge.

If you like the ring, gack it when the clerk turns around.
by BlackArthur January 3, 2004
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