A promiscuous woman
A woman that has been with a group of friends.
Dude, your girlfriend's not even a thot, she's a birthday cake...everyone has had a slice of that.
Eating a girl out on their birthday.
Person 1: hey man, whatcha doing tonight?
Person 2: It’s my girls birthday, so you know what’s goin down.
Person1: oohhhh, eatin some birthday cake huh?
giving someone a bj (blowing the candles out) then eating them out (eating your cake)
oh he’s so hot i would give him a birthday cake if he asked me too
A prolapsed anus with a hemorrhoid sticking out.
We was boutta get down and then she pulled out a Birthday Cake.
When your mom and/or dad lets you practice anal on them as your birthday present as they couldn't afford that new hot wheels play set at walmart
Person 1: Bro My Dad gave me that Birthday Cake and my ball sack still hasn't recovered
Person 2: Bro you're so lucky! all i got for my birthday was a Sex Slave
The Act of Slapping your partner in their face during sex as they are about to climax, immediately followed by giving them surprise Anal.
That nasty slag down the hall really enjoys her birthday cake.
A buttock.
Alisa went to the club and got drunk. She then decided to show everyone how beautiful her birthday cake truly is.