1 definition by Iffyy09

Top Definition
it is most commonly known as someone
with large hips and is normally fat and

the fat is collected at the buttox area

It can also be slang for...
F- Funny
A- As
T- that
A- annoying
S- small

S sausage
jane- and then i fell i down the stairs and face planted the curb

lisa- FATASS thats so funny
by Iffyy09 July 03, 2010

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