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(shh-ah-Nah-stE) adj. a discription that represents the best of something...more awesome than awesome ever was...if badass ever thought of being shanasty it would wake up and apologize
Man: I got laid last night
Friend: Really how was it?
Man: She had some ShaNasty ass pussy.
Friend: wow man you better put a ring on it if it was that good.
by DJtothaMal January 07, 2014
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nasty or unsavory, particularly used in the homosexual community
To hear Gary tell it, Ace turned out to be pretty shanasty in the bedroom.
by Vincent D November 02, 2010
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