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A Harley Davidson Sportster motorcycle customized to resemble a Fat Boy model, usually with a wider front end, larger gas tank, and lower fenders. People create fatsters both because it is much less expensive than buying a Fat Boy and also because the Sportster models have much faster engines than the slower Fat Boys. Sportster models are often looked down upon as being "girl bikes" because they are often the less expensive models which men will buy for their wives, and this may play a role in the desire to change their appearance.
I couldn't believe that Bill bought a Sportster until he turned it into a Fatster.
fatster by Nefariouslacker January 15, 2009
Related Words
A fatster is a hamster that is very fat, chubby ,or thicc.
DAMN look at the size of that Fatster
Fatster by Jr not Sr October 13, 2020

Fatstrong 

Weight-training enthusiasts who are simultaneously fat and strong. Fatstrongs are often, but by no means exclusively, powerlifters obsessed with the Big 3 Lifts (bench, squat, and deadlift). They look with scorn upon those who have such goals as pleasing aesthetics, mobility, or walking up a flight of stairs without hyperventilating.

In the mind of the fatstrong, every conceivable physical goal can be achieved through more squats and oats. They are oblivious to their own bulging bellies, horrific posture, and anathema to women. Medial deltoids not growing? Do more deadlifts. Calves too small? More deadlifts. Pencil neck? More deadlifts. 30% bodyfat? More deadlifts and oats.

Ideally the fatstrong should sport a shaved head and jaunty goatee. While frequently intelligent outside the gym, the fatstrong exhibits a body dysmorphia (aka bigorexia) comparable to the fat chick who thinks she's gorgeous and men are just 'intimidated' by her.
Any mod on any powerlifting forum. Many fatstrongs can also be found on sites like bodybuilding.com and t-nation.com. They can be identified through the following question:

Q: "Hey, I've been following a basic program of compound lifts for a year now. My (any body part) is lagging though. What isolation exercises should I do for (body part)?"

Fatstrong A: "LOL! PHAGGOT! WHY DO U WANT TO BUILD THAT? JUST SQUAT U FCKIN PUSSY! COME BACK WHEN U WEIGH 250 AND R PULLIN 5 PLATES."
Fatstrong by CAPSLOCK HUSTLA August 5, 2013

fatter fuck 

A fatter fuck is fatter than a fat fuck.
Look at that fatter fuck over there. He's having another desert after desert again. And he thinks that diet coke is going to reduce him to a fat fuck again?
fatter fuck by Ronnieoc714 October 30, 2013

Move Faster Pokey!!!!! 

The most epic voice crack in LP history. Originated from the voice of LPer ProtonJon, is now a popular meme among the gaming community.
Move faster Pokey!!!!!! FASTER!!! For the love of god faster!!
Move Faster Pokey!!!!! by pbudp January 15, 2011

Whites Live Fatter

The presumptively ignorant belief that through out history it has always been advantageous to be white.
He was used to a life of: warnings by the police, 5 star vacations, swimming pools, tennis courts, credit cards, college degrees, career promotions, and tax evasion which all goes to prove Whites Live Fatter.
Whites Live Fatter by Ranchgirls November 18, 2020