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A penis, specifically a bulbous or "chode" like member. Less of a "shlong" more of a "wang".
"Slap a fat one in your mouth and STFU"
fat one by Colly May 13, 2005
I slapped a fat one with my fat one!
fat one by MBC April 1, 2003
An overly sized penis (like my own).
Nice hair faggot. Choke on a fat one fucker!
fat one by Huge fucking dick April 1, 2004
When you nut so good the shit splatters everywhere.
Yo homie I busted a Fat One last night. Good ass premium porn.
Fat One by DashUnaSkorDash September 20, 2018

Fat one 86 

A greeting used during conversation with a Streamy.
“What’s up fat one 86?”
Fat one 86 by MysticalGod January 1, 2022

Rip a Fat One 

To rip a fat one is to rip a massive fart that could potentially cause an earthquake or rip a large hole in the pants.
This fart is usually extremely stinky, pretty much equivalent to the same gas used in world war 2 by the nazi executioners.
Jared - "Oi Atef! Rip a fat one!"
Atef - "*Rips a fat one*
Rip a Fat One by Atef Lord February 8, 2021
More from Urban Dictionary
A US deep south term for an alligator. Usually used in the Cajun dialect.
Take the big pirogue, I saw a huge swamp dog out there earlier.
swamp dog by Crystal Ambrose May 22, 2006
Word of the Day on October 12, 2026

Throat Sweats 

The feeling and build up in your mouth/throat of saliva that sometimes accompanies nausea.
Oh man those burritos gave me the throat sweats, I hope I don’t have food poisoning.
Throat Sweats by TacoFings420 April 23, 2024
Word of the Day on October 11, 2026
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