fatty back 

a round butt; a big butt

Didi you see her.... she's got a fatty back.

fatty back by ashey June 11, 2005

back a fatty 

(v.) To stand up for a fat person, despite the fact that you are hurting your own reputation

Don't make fun of her just 'cause she's fat! She can't help it...

back a fatty by psudonym March 7, 2005

back a fatty 

Having sex with a fat man.

Backing a fatty includes lots of lube.

back a fatty by aanksta luver March 5, 2005

Fattybucks 

there is no justification attached to a purchase other than I want to, I can, so I will.

Rob didn't need a new boat, but he wanted one, he had enough fattybucks, so he did.

Fattybucks by UknownBSer December 9, 2010

fattypack 

A roll of fat that flaps over the top of pants, lookign like a fannypack.

Dam! That chick has a huge fattypack!

fattypack by cbtchy October 27, 2010

fattyback 

A fat ass that is just so round and juicy u can't stand it. popularized by the go-go song. so it's sayed a lot in DC

she got a fatty back oh-oh-oh

fattyback by yo muvva August 28, 2005

flattyback

opposite of fattyback. a girl with no "assets"

Girl was tryna holla but she was built like a wall. flattyback on one side flat chest on the other

flattyback by yo muvva August 28, 2005