Brownbeard

To receive a brownbeard, means that you have been performing oral on your sexual partner, when the partner decides to shit on your face, covering your chin and possibly more of your face. Brownbeards are typically received when the partner is suffering from explosive diarrhea.

'Oh my God I'm so embarrassed, when Jimmy was licking my ass I gave him a brownbeard'
'Hey baby why don't you give me a brownbeard tonight?'