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1.
An exemplary display of manliness in the form of an awesome beard
Captain Ahab: That not be any oridnary swashbuckler's beard. That be a man beard! Beware!
by Bastien McBeard August 23, 2011
 
2.
The beard on a boy who is trying to be a man by growing facial hair but fails.
Yuck, that guy's man beard looks like pubic hair.
by shazam1234 November 05, 2009