Like fantastic, but referring to fatasses. Can be used with food, places, workouts, etc.....
A: Hey did you go to the party?
B: Yeah it was fatass-tic! There was food every-fucking-where.
by ThLatinProdigy May 07, 2008
1 more definition
Top Definition
A fantastic large person. A pleasantly large rump is also acceptable.
That chic be fatasstic!
by mYsteriousL December 13, 2011

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