This is a characteristic often found in people who generally lack motivation and smoke copious amounts of marijuana. Nerb behavior is often defined as lazy, slow, and a lack of emotion.
Matt was such a nerb today, all he did was smoke and fall asleep on the couch while everyone else went out to the bar.
by Karl mayor of creep street March 06, 2010
The kind of nerd who gets excited about obscure grammatical questions and discusses them ad nauseum. Etymology: a play on "noun" and "verb".
Can you believe those nerbs? They actually spent ten minutes this morning discussing the correct pronunciation of "plebian". I hate people like that.
by maskedwoman February 13, 2014