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Word used to describe left over food and food that inevitably escaped the mouth, also includes foods that may or may not have been placed there by owner of beard and food. Food particles and chunks are almost always visible to the naked eye and noticeable to everyone the beard owner comes into contact with.
"Bro I am so hungry you up for some food"?

"Nah man I've been munching on some beard grub I stashed away at lunch".

"Damn. I need a beard".
by taypetes September 30, 2014
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