Birthday Dick 

Happens the morning after a man ejaculates and doesn't wash his penis, the result is a penis covered in frosting, just like a birthday cake.

"Ewww Johnny, I'm not sucking your penis, you have that birthday dick!"

Birthday Dick by Rustyrastafari August 3, 2020

Birthday Girl 

A person who has had so much alcohol that they pass out within a short time of partying. The gender of said partier does not matter, nor does it matter if it's the person's birthday or not. Basically being really, really fucked up.

1) A. Woah there, why are you carrying Jarrett out of the party already?

B. He went into birthday girl mode real quick tonight, sorry guys.

2) A. Hey Cody, nice win for the football team huh?

B. Hell yeah bro! Parties are going to be sick! I am definitely going birthday girl tonight.

Birthday Girl by Moosenman December 21, 2012

birthday blunt 

(noun). A blunt saved for the sole purpose of getting high on one's birthday.

Were you at Kelly's party? The party really started when she brought out her huge birthday blunt!

birthday blunt by malman32 March 6, 2009

Birthday Muffin 

To bake a muffin then ejaculate on it and then throwing it at the face of the recipient, while exclaiming "MAKE A WISH!!"

I waited several hours to give my mom the birthday muffin i made her.

Birthday Muffin by June & Legik December 2, 2010

Birthday Bandwagon 

People who you don't like and/or people who you don't know write on your Facebook wall when it is your birthday

Sally only wrote on my wall because she is on the Birthday Bandwagon

Birthday Bandwagon by pimpscrabble March 20, 2011

Birthday Like Spree 

The liking of every post on one's wall on one's birthday, often seeming incapable of actually thanking the people who wrote.

Alex: Dude, Kramer liked every post on his wall. WTF

Ross: Yeah, man, he went on a birthday like spree

Birthday Like Spree by Jorby September 8, 2011

Birthday Robogreeting 

A meaningless email wish to have a happy birthday, sent to you by a computer on your birthday from one of the stores, banks, or websites where you have entered your personal information, including your birth date.

I just got my fifth Birthday Robogreeting today, this one from the Corvette Forum.

Birthday Robogreeting by tquinn January 31, 2012