The game by which a participant must drink an entire gallon of milk within an hour without vomiting.
After attemping the Gallon Challenge, I had to clean the floor and buy a new shirt.
by Brozi November 29, 2004
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A term to describe consuming 160oz of beer. If you are drinking 32oz beers, the 5th one would make a bakers gallon.
After Boaz drank a bakers gallon of beer, he got another lap dance.
by Bernard Bangwanger November 6, 2004
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The exact amount of cum needed to overload a woman's throat, mouth, and nasal capacity causing cum to spray out from her mouth or nose
I haven't nutted in 2 weeks. I'm going to give my girl a whore's gallon
by J0hnfrum September 6, 2018
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A term used when gaming and someone or something is far away, you say it is a ‘gallon’ away. This cryptic conversion of distance and volume is not supported by the dimensional analysis technique but rather by advanced physics with use of higher levels of calculus and differential equations.
Bro why are you shooting at him he’s a gallon away
by , November 14, 2021
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That extra ~1 gallon a car really has when the low-fuel light shows up on a car's dash. You think you're totally out of fuel but you actually have another gallon to go....it's a courtesy gallon!
I have been driving on this courtesy gallon for a little too long; I should probably go to the gas station.

I was afraid about breaking down on the road but remembered I still had my courtesy gallon!
by colinstu April 18, 2011
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That douche bag that goes to classes with a gallon jug of water or some other liquid. The need for this kind of hydration in a class that at most will be in session 3 hours, is excessive for any human being, even Michael Phelps.
"That guy brought a gallon of water to ENG 101? Really? What a Gallon Douche"

"Man, that guy looks like such a douche carrying that gallon of water across the quad. We should call him a Gallon Douche"
by mikedaman82000 March 31, 2010
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when you cum a gallon into a slut. (prob was susan)
man dude susan ate a gallon of cum last night it was litttt
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