The small, bristly patch of hair beneath the lower lip of men who are harvesting their facial hair in an attempt to look cool or hip or trendy. Often used to 'brush' the 'bean'.
That new guy in marketing has a pretty sweet bean brush. I bet his lady loves it.
Someone you've had sexual relations with's new lesbian partner. Like a tunnel buddy, but without anything to drive through the tunnel. ...but you've both been with that bean.
Guess this means you're my bean buddy now, Cheryl.... you know I came all over that, right?!