Top definition
the member of the crew always looking for something to eat.

someone who is always hungry.
Fatboi where are you!?

You're such a fatboi!
by bender1010101 October 09, 2009
Get the fatboi neck gaiter and mug.
2
Some who is obese in size and is quite frankly fat.
Can be used as someone's name.
Josh is a fat boi.
Fat boi (Josh) come here.
by Kurtishasabigdick July 01, 2019
Get a Fat Boi mug for your mother-in-law Sarah.
3
One who is the fattest individual among his group of friends or peers. This individual often does not believe he is fat and will accuse others of being more fat then himself. Often has a skinny body but an enormous gut.
Dear God, have you seen 120, that guy is a FAT BOI. His pre-bed beers have really caught up with him. Disgusting.
by Fatso120 August 05, 2019
Get the Fat Boi neck gaiter and mug.
5
Its the definition of a person I met yesterday and I started calling him fat boi Jay
by Myabsi November 17, 2019
Get a Fat Boi mug for your barber James.
6
Some who is obese in size and is quite frankly fat.
Can be used as someone's name.
Josh is a fat boi.
Fat boi (Josh) come here.
by Kurtishasabigdick July 01, 2019
Get a Fat Boi mug for your buddy Vivek.