Definitions by Singledee

EMUB 

(noun) Acronym for Early Morning Urinary Boner. This is when you wake up in the morning with a rock-solid hard on because you have to pee really bad.

Girlfriend: Keep your boner away from me. It's too early and I'm still tired.

Boyfriend: Don't flatter yourself...it's just an EMUB.

EMUB by Singledee December 17, 2011