A fat party animal ("rolling ball of fun").
A: Who was that guy who hung around the dessert tray all night? He was hilarious.

B: Oh, that was my buddy Seth.

A: Yeah, what an RBOF!
#chris farley #louis anderson #sam kinison #fat #overweight
by Lennie Mac May 08, 2006
Top Definition
A fat party animal ("rolling ball of fun").
A: Who was that guy who hung around the dessert tray all night? He was hilarious.

B: Oh, that was my buddy Seth.

A: Yeah, what an RBOF!
#chris farley #louis anderson #sam kinison #fat #overweight
by Lennie Mac May 09, 2006
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