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much like a dirty sanchez, it is when fecal matter is applied to the face in such a way it covers the entire lower jaw and upper lip. it is also typically applied by pirates (homosexual or not) to other sleeping pirates/crewmates/scurvy dogs as a joke. it is punishable by having to walk the plank, getting the shit beaaten out of you, or recieving a brownbeard in an act of revenge from the victim.
"yaaaarrrrr, captain, i gave steve a brownbeard last night! he has no idea!" this is followed by plankwalking and "aaaars" of disapproval, or a hearty round of pirate laughter.
by quintin pruett August 08, 2006
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As a man goes down on a woman she farts on his chin and gives him bad breath for the rest of the day. She then kicks him out and tells all of his friends that he has a small penis.
The foo got brown bearded. So none of her girlfriends would call him.
by F Man December 06, 2008
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It is an awesome combo starting with a blumpkin and the finishing it off with a salty pirate.
Last night I gave that chick from the club a mean brown beard. The weird thing is, she loved it!
by KevinDaKing August 21, 2007
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When someone is new to the internet, roughly from 1 second to 3 years, for them to learn the ropes and how the internet works. After 3 years on the internet, a Brown beard would become a Grey Beard.

..It's usually your grandparents who would fit in this bracket
"We got ourselves a new Brown Beard!"
by The Unintelligent Librarian August 27, 2019
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To receive a brownbeard, means that you have been performing oral on your sexual partner, when the partner decides to shit on your face, covering your chin and possibly more of your face. Brownbeards are typically received when the partner is suffering from explosive diarrhea.
'Oh my God I'm so embarrassed, when Jimmy was licking my ass I gave him a brownbeard'
'Hey baby why don't you give me a brownbeard tonight?'
by Lonitwat November 14, 2016
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