look up any word, like cunt:
 
1.
When its your birthday you guilt your partner into giving you a blowjob because its your birthday.
I still have you in my mouth from that birthday blowjob that I didn't want to give you last night!
by Novacaine86 May 03, 2010
 
2.
On a guy's birthday you get a blowjob. Does not have to be performed by your girl/boy friend or wife but they have to pay for it (one way or another).
Happy birthday buddy! Don't forget your birthday blowjob.
by gee-orgy-oh May 18, 2011
 
3.
In the US it is customary for a woman to discontinue the practice of fellatio upon wedlock. The birthday blowjob is the exception to the rule and the only real legitimate source of head a married man is entitled to.
Guess what today is? I'll answer for you since your mouth is full... that's right it's MY BIRTHDAY BLOWJOB DAY!!!!
by ThePooch June 07, 2011
 
4.
When its your birthday you guilt your partner into giving you a blowjob because its your birthday.
I still have you in my mouth from that birthday blowjob that I didn't want to give you last night!
by Novacaine86 May 03, 2010