An extremely sexual and mysterious young man with prematurely grey hairs. Usually extremely skinny and attractive.
Look at that greybeard dancing, he's amazing!
by flowerfist January 13, 2011

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Top Definition
An older man, usually someone with seniority in a business, a labor union or other community. Often used disrespectfully by younger members when referring to preferential treatment or out-dated behavior.
I hate the grey beards. They do nothing but talk about the old days and get first dibs on all the good assignments.
by PrimalChaos August 14, 2010

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In Information Technology and specifically Computer Science, the term "Grey beard" or "Greybeard" is used as a droll, sarcastic way to describe any person who is older. Typically, a Grey Beard in IT will be very specific about methodology and have well-reasoned arguments about why the methods they are using are superior to current ideas and methods. Many times, they're not wrong!
Computer scientist Douglas Crockford's infamous talk on Quality is deeply insightful; one would expect nothing less from a grey beard.
by MmollzZ February 24, 2017

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when a girls boyfriend is a mortician and he is fucking the bodies on a regular bases, he will acquire a mite on his penis. when his girlfriend gives him a blow job, she will get the mite on her face. when the mite bites her she will get a Grey rash across the bottom of her face. thus...Grey Beard.
this girls boyfriend worked at the city morgue. since his girlfriend wouldnt put out enough he decided to start fucking the corpses in the body room of the morgue. after awhile a flesh mite got on his penis and bit his girlfriend one day during a blow job and she got a grey rash on her face. thus...Grey Beard.
by pan-cock-ay March 05, 2007

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