Short for the old nerdy saying "gee-whiz." Gee-whiz is an exclamitory word.
Geez Susie, how did you get a black eye?
by Randy Bonjour June 19, 2006
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to play a video game for an extended period of time and neglecting to carry out normal human functions like eating and sleeping.
Jimmy is geezing world of warcraft again; he needs to get a life.
by Jwi518 May 8, 2008
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Geez is short for geezer. Geezer is an old person, usually a man. When you are shortening up a sentence (and trying to sound hip) you say geez, not geezer.
by MsLi September 10, 2005
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to 'look' at and/or into something.

" have a geez at that chicks head" LOL
by Jessii MB April 14, 2009
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To "shoot" tiny drops of spit out of your mouth. This is done by contracting the gland that secretes saliva.
by SykO September 18, 2003
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