a grotesquely obese female that makes for a good hit and run because of her zealous eagerness to please
I'm sore from digging out that tons o' fun last night.
by Herb N. Dictionary October 25, 2002
A large or morbidly obese woman.
Hey dude check her out, she'd be tons-o-fun in bed !!
by shomesomethin July 13, 2010