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a person who makes up or lies about certain things that really don't matter. tells stories that aren't true or says things to look cooler.
Wow, that guy over there is such a gupster...what a guy.
by BSss; August 07, 2011
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grungy urban professsional hipster
How does that gupster keep his investment banking job at Goldman Sachs, don't they require clean-shaven faces and daily showers?
by aerialkat March 29, 2010
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