10 gallon asshat 

1. an asshat of extreme proportions.
2. one who engages in frequent and unwarranted asshattery

that man is a 10 gallon asshat

10 gallon asshat by z-minus August 25, 2005

Gallions Reach 

A painful sex move that involves somebody reaching up into your arsehole.

Carla: "Gallions Reach inside me Bob!"

Gallions Reach by Robyn (bob) Elton October 21, 2007

Gilleon 

an uncommon welsh name; all around amazing person in general

"omygosh you know lilly's boyfriend gilleon? he's so cute..."

Gilleon by dontask121 March 9, 2010

Gallon Of PCP 

Gallon of PCP is a refrence to the 2007 skit from "The Whitest Kids U' Know"
where 2 highschool buddies run into each other, Trevor and Zach, but Zach has a Gallon Of PCP.

Guy 1: "What do you have there?"

Guy 2: "A gallon of PCP."

Guy 1: "I didn't know it came in liquid form."

Gallon Of PCP by Kekorcringe September 30, 2020

The Gallon

The Gallon is a unique specimen or as others may refer to it as the“Big Body”. The Gallon comes with great power as well as great responsibility for if it’s full power is unleashed it may tear the very fabric of our reality. Although to fuel his great gallon power he must consume a hefty amount of marijuana every day.

Person one: Bro is that a Gallon?
Person two: I hear the gallon
Person three: Don’t stare! I think we got his attention.

*Gallon walks over*
Gallon: Hey boys, got any weed?
Both person one and two: Nah man we chiefed our whole cart.

The Gallon by Lichlord333 October 13, 2020

all nine gallons 

the act of a person blowing off his load and splurging out all nine gallons

josh had went all nine gallons on that hoe

all nine gallons by wooderman123 February 14, 2017

130 ounce gallon 

An overachiever or a person who does more than required. Derived from the fact that a gallon is 128 ounces, and 130 is more than a gallon.

Of course he is working another 14-hour day, he's a 130 ounce gallon.

130 ounce gallon by Silent Barracuda August 30, 2019