Top Definition
Grilbert: Foolish lamely idiotic person doing stupid things without thinking, not quite as dense as a wally. You may call a friend a Grilbert to get the point across without totally infuriating them (and because the word is lightly used they may not know whether to get pissed off or not)
Arnold you are a total Grilbert at times!
by M Hobson June 23, 2007
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