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1.
a combination of lating word for smell funk and distgusting nasty. Used most often in the cases of a person or object that one would not want to be near or around.
David just slid through a tough of cow manure, he is beyond funknasty.
by Thomas Crawford November 18, 2004
 
2.
Excessively gross or provoking an upset stomach. Presence of something like this can cause vomiting or screams of horror.
"Somebody crapped all over the floor!"

"That's funk nasty!"
by Andy Carroll April 06, 2006
 
3.
Funk-nas-ty, adjective. Being incredibly gross or disgusting. Usually associated with perverted behavior and grotesque acts performed by unintelligent people in their teens to mid-20's.
"That band was funknasty, I will never go see them again."
or
"He stuck how many fingers up her ass? Five? Now thats funknasty"
by anonymous2134 January 19, 2013