What is Fat Friend?
1.
A girl or guy you keep around to make yourself appear more attractive. They usually have some outstanding quality like humor that makes them worth having around.
Bertha is funny,sweet and smart but she is my fat friend so everytime we hit up the club i get all the guys and the attention.
See
2.
The obese/chubby friend of a hot male or female that can always miraculously keep them out of a relationship with you. The best thing to do with them is to friend them, then start a relationship up with your target. Afterward, do something that will cause the fat friend to split up with your lover, so that there will be no more of her/him.
Dave: My god man, that woman is soo hot. The things I'd do to her...
Jason: Good luck, man. Her fat friend always pulls her outta here before you can do anything.
See
