Gallyon 

A SHITTY UGLY LOOKING GIRL FUCKS EVERY GUY SHE KNOWS AND LOVES TO HAVE SEXXXXXXX AND FUCK AND CUM
WATCH OUT SHES MEAN TOO

Guy1: Wow Look Gallyon Shes Such A Slut
Guy2: Oh My Yes I Want Her To Ride Me And Cum On Me

Gallyon by Hello Peplle March 13, 2017

Gallon Gluttony 

A group of middle class and bored adolescents who smash gallons of juice, milk, and other fluids at local supermarkets for youtube stardom and for the purpose of a supposed prank.

Eric Steinberg: Hey man, my mom left me her Bmw, so we can go to the Metro and do some Gallon Gluttony.

Chad Dawkins:Oh bro! Nice, lemme get my cam so we can get some views!

Gallon Gluttony by TERminalambiaNCe March 11, 2013

gallon booty 

a booty that is enourmous. an ass that look like it got gallons of something. the biggest ass ever.

damn, you see that redbone; shawty gotta gallon booty!

gallon booty by samantha_cheree May 9, 2009

smiles per gallon 

A play on the metric miles per gallon. Describes the overall fulfillment and enjoyment of a driving experience, rather than fuel economy. Used often in the car enthusiast community, when referencing vehicles that focus primarily on performance rather than daily drive-ability and convenience.

That car may suck up gas, but it makes up for it in smiles per gallon.

smiles per gallon by DemonOfRazgriz June 15, 2018

Gallon Red 

The nameless overly sugared crimson ambrosia of your local corner mart. Like kool-aid, but much cheaper and thicker. Gallon red refers to the red cherry/tropical flavors, but can be in other flavors as well: green (lime), blue (blue raspberry), orange, and questionably black (grape). Always cheap, never filling.

Yo lets hit up the corner mart and get some gallon red

Gallon Red by Pancho Lama April 2, 2007

Galleoning 

The sexual act where one defecates on a partner's face, then proceeds to rub said faecal matter into the face with a back and forth motion of the buttocks. The buttock cleavage should form a groove into which the nose slots, providing a guide for this motion.

This was allegedly the act to which Meatloaf referred to in the iconic song lyric: "I would do anything for love, but I won't do that".

Jim: "Hey Randy, you know what Meatloaf wouldn't do for love?"

Randy: "Don't tell me, galleoning?"

Galleoning by SirReginald January 14, 2011

Gallon Challenge 

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.

Gallon Challenge by Brozi November 29, 2004