look up any word, like blumpkin:
 
1.
1)f-word-ing nasty. 2) Fuggin' nasty.
The grease dumpster behind McDonalds be FNASTY twofold.
by PTchi July 09, 2005
8 2
 
2.
Simultaneously fat and nasty

-When an object exceeds being fnasty, the word "fnastier" is used instead, but pronounced as if it were French: "fnastiyay"
That girl is fnasty, but her cousin is fnastier.
by Le'Kiesha April 23, 2007
0 2