1. obsolete vulgar slang A penis. "Beard" here refers to female public hair. No, sir, I don't want to see your beard-splitter—pull up your pants!
2. obsolete vulgar slang A man apt to engage in sexual activity, especially with prostitutes. I do not know why she looks so fondly upon George—he's a known beard-splitter and drunkard.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.