Top definition
Simple really, fat+ass+massive. Hence the word fatassive
"Wow, look at that fatassive chick!"
by Scott "fmg" L February 12, 2006
Get the fatassive neck gaiter and mug.
Jul 1 Word of the Day
It's the sweat that accumilates under big boobs
It was so hot outside that I had mass amounts of boob sweat.
by Tiffany2583 January 05, 2007
Get a boob sweat mug for your friend Nathalie.