A nice guy who has a great fashion sense and is a metro sexual. He likes to wash his face lots and moisturize and wear sunscreen even though it is winter. Although he does this he is still a great ladies man.
Guy 1: Why are you so pale

Guy 2: I put on sunscreen

Guy 1: Oh you're such a Greven
by Flagellah May 29, 2013
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A strange creature, often seen lurking around public changing rooms wearing red underpants.
Who is that at the window?, oh its a Greven
by Darke Harkonnen February 12, 2004
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