fratbook 

the most convenient form of communication for fratstars used to keep up with brothers and of course the sorostitues from the night before. also, a great way to keep up with other people's business and to know who's hooking up with who.

"dude, did you see her fratbook she is totally dating that GDI."

fratbook by sorostitute 911 October 21, 2008

Fatbook

A nick name for "Facebook" derived from users reconnecting with each other after years of no communication and seeing that each other has gained substantial weight.

"One of my high school ex gfs found me on fatbook last night. Man... she's twice the woman she used to be!"

Fatbook by Dentura Hogfloss April 7, 2009

Fartbook 

A vulgar yet humorous way to refer to Facebook

God damn it, Fartbook won't load up again!

Fartbook by dollarbill3585 September 24, 2013

Fatbooking

Whenever fat people send you friend requests on facebook, most commonly fat chicks. Also usable when a fat person writes on your wall, or tags you on a status, photo, or video.

Guy 1: Gad Damn it!
Guy 2: whats's up?
Guy 1: This fat chick named carolina keeps trying to add me on facebook
Guy2: oh yeah, yeah i had the same problem with your mom, she kept fatbooking me.
Guy 1: WTF?

Fatbooking by NotRacistCuzMyPresidentIsBlack October 20, 2011