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1.
The hangover induced by the marijuana o(-_-)o

Best described as not entirely waking up.
Hey Justin you look gronky, you party with mary jane last night?
by Kasim223 February 17, 2010
 
2.
An unattractive, and uncordinated person
Man that chick is fully gronky. I wouldnt even do her with yours.
by tborg July 14, 2004