Top Definition
The day in which no matter the excuse, your girlfriend permits you the opportunity for anal sex. Fortunately for the men this is a fact!! Ref:-The laws of co-habitation, 1883- mcMiller, Brian. Book 3 chapter 4, section 69.
IE: Jeff- " hey honey guess what day it is?"

Random hot chick- "hump day?"

Jeff- " kinda! It's my b-day which includes birthday anal, plz adopt the position."
by Rules of engagement December 03, 2013
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.