look up any word, like jamflex:
 
1.
cunnilingus or anilingus (or, if you can't spell, analingus)
"Girl I'm ready to toss your salad / While makin' love, girl, I'll be feastin'." - R. Kelly, "Sex in the Kitchen"
by BayPlaya January 02, 2008
 
2.
eating a large amount of food for a long period of time.

See grubbin'.
I haven't eaten all day, so don't bother me while im feastin'.
by jay bueno December 19, 2007
 
3.
To embarass someone or to defecate on them in public.
When they got to spittin he was feastin on ma mans
by Dnell20 November 25, 2007