birthdanal 

The act of engaging in anal sex during one's birthday is referred to as birthdanal (shortened from birthday-anal)

It is often thought of as a gift or favour from one's partner, something that they are only willing to do because it is the partner's birthday.

Care should be taken during birthdanal to avoid contracting birthdAIDS.

My girlfriend agreed to birthdanal.

birthdanal by ItsAadam July 23, 2011

Birthdanal 

The act of performing anal on your birthday, giving or receiving.

"I'm going to see Phoebe tonight and for my gift I'm gonna get to do birthdanal with her"

Birthdanal by NotJoab May 19, 2018

BIRTHDANK 

🔥 A STONER version of BIRTHDAY

🔥 A celebration of when you first try

anything DANK

🔥 Happy BIRTHDANK ..man

BIRTHDANK by ClassicRonnie July 29, 2019

Birthdaynal 

Anal sex that you only get on that special day once a year

I finally get to Birthdaynal my bitch

Birthdaynal by XfinityNAnal August 31, 2017

Birthdatly 

There is a day each year where people celebrate their date of birth. This is the birthdatly

"Did you wish Micah a happy birthdatly?"
"Yeah man, I was part of his surprise Birthdatly Party!"

Birthdatly by Bartholemew Bubbleson September 23, 2020

Birthdanksgiving 

A rare phenomenon that occurs when someone's birthday coincidentally falls on thanksgiving

"Happy birthdanksgiving, Craig!"
"Thanks, Matt! I'm gonna have to figure out how to eat a turkey and a birthday cake in the same night!"

Birthdanksgiving by expecto-petroleum November 26, 2020

Birthdanksgiving 

A rare phenomenon that occurs when someone's birthday occurs on the same day as Thanksgiving.

Origin of Word: Portmanteau of the English words "Birthday" and "Thanksgiving".

M: "Happy Birthdanksgiving, Craig!"
C: "Thanks, Matt! Isn't it nuts how i'm gonna have to figure out how to eat a whole turkey and a birthday cake within a single day?"
M: "You know you don't have to eat the WHOLE turkey, right?"
C: "wait what"

Birthdanksgiving by expecto-petroleum November 26, 2020