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2.
The feeling a new dipper gets when trying smokeless tobacco. Also when a dipper puts in way more than they are used to. Characterized by a dizzy feeling usually accompanied by vomiting. Often missed by experienced dippers who cannot achieve such a buzz even when taking large quantities of dip.
Person 1: Do you see Cedric puking over there?

Person 2: Yeah he has a massive head buzz.
by cedar wood January 06, 2013
 
1.
The buzz you get after smoking weed that mostly affects your head area. The opposite of a body buzz.
Murray: Pass the joint yo!
Kenny: Sorry man my head buzz is so strong I can't think.
Murray: lucky bastard.
by mitchell25 April 23, 2006