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To deride someone for their facial hair choices; an attempt to cause shame in someone for unpopular mustache and/or beard styles.

Often secretly motivated by envy.
God, what's up with Jason's hideous pornstache pic?

Wow, Eric, you're looking pretty neck beardy there.

My girlfriend was totally mustache shaming me by posting those old photos of me with a soul patch!
by Catemonster March 20, 2012
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