Japanese Birthday Surprise 

Given on someone's birthday, this involves tying down the recipient and attacking them with tentacles shaped like giant penises, followed by urinating on them. While this may sound unpleasant to the average person, there are at least 20 different hentai mangas devoted to this very subject.

Geoff: Happy 22nd, Jamie! Now it's time for your Japanese Birthday Surprise!

Jamie: Japa-what? What the hell are you... oh my god AGGHHHHHHHHH

(screams of agony are heard)

Japanese Birthday Surprise by Jeff Shewer May 17, 2009

chocolate baby birthday bukkake

A sexual act that involves a man ejaculating on a woman's face while she gives birth to a child of African descent.

Did you see 'Gang Bang Girl 13'? That chocolate baby birthday bukkake scene was amazing!

chocolate baby birthday bukkake by Donna Jacobs October 30, 2007

worst birthday ever

a phrase to use when something goes completely wrong or life sucks. (Mark Baker 2007)

'waaaaa, i failed therms. worst birthday ever'

worst birthday ever by lea-unitt. July 13, 2007

Tom's birthday

Time Of the Month's birthday, a woman's menstrual cycle or period.

Don't piss me off, Tom's birthday is coming up!

Tom's birthday by eeks13 December 9, 2010

Belated Birthday

Saying Happy Belated Birthday is a really gay way of saying i forgot your birthday. Either man up and say sorry i forgot your birthday or tell them the truth, that you don't give a shit that it was their birthday.

guy 1) Dude Happy Belated Birthday
guy 2) So you're saying you forgot my birthday
guy 1) well...?
guy 2) You're a Fag

Belated Birthday by Manager OD December 11, 2010

it's my birthday NIGGA 

a loud proclamation said by someone when it is their birthday, usually highlighted by said someone forcing a door open with their foot

It was quiet in the house, when all of a sudden Steve busted the door open and yelled :

"it's my birthday NIGGA."

Everyone immediately gave Steve all their money from their respective wallets.

it's my birthday NIGGA by Galbert-Kun April 4, 2009

Crown Birthday

A birthday where one's age matches with the day of the month.

Mike: Hey, isn't your b'day coming up?
Stu: Yeah, it is.

Mike: Isn't it 16th of this month?

Stu: Yeah, also I'm turning 16. It's my crown birthday!

Crown Birthday by InternetHuman July 6, 2015