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.
by hottiehothots September 25, 2006
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A person that is acting stupid or irrational. This word is used as a insult but mainly amongst friends...
Ellis: Bro, it was a joke your such a Gronkus!

Whinnie The Pooh: Nah fam your just a waistman!
by Hairless child November 18, 2018
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