Top Definition
An idiot that doesn't know shit about anything relevant; and is usually trying to look hard and be a mad cunt!
G.I. - "oi that gronkus is tryna ring me again wtf"

JOE - "yeah mate this guys got no bloody clue!! what a gronkus hahaha!!!!"
by Duhncan Corleone July 22, 2014

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another word for gronk, often describes more extreme gronk.
OMG that guy is the biggest gronkus
by hottiehothots September 25, 2006

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