A slang term for "nasty". When one tries to enunciate "nasty" with a lame accent it may be mistaken for "nehsty" which has been changed to "neesty" to avoid any change in enunciation no matter what accent one may have; One who is "nasty" at something, metaphorically speaking.
A nhesty is a person who is godlike when it comes to intelligence. She is almost perfect in every aspect and knows how to predict what's gonna happen based on her rational thinking.
Another word for nasty, but of a heightened nastiness. Old cheese is nasty. Old cheese with diarrhea on it is nersty. Often pronounced with a long "r" as in nerrrsty.