14th birthday

Early teen, building their tiktok platform by day and sleeping (or snapping guys/girls) by night. When they throw their birthday party and receive the cake, now, 14 year olds may choose to smash their face in the cake or share it with fellow partiers.

"happy 14th birthday"
"SMASH THE CAKE NOW!"

by UrbanDictionaryACC May 14, 2021

Unhappy birthday

For some reason, this has not been defined on urban dictionary until now.

Anyways, if you are looking for the definition. It's self explanatory (The opposite of happy birthday, used as an insult when it is someone's birthday).

Jacob : Today is my birthday! Will you come to my party?
Micah : Absolutely not, and unhappy birthday!

by joecycs November 13, 2021

Moth Birbday

This is dedicated to my friend Moth who doesnt know their birthday. So like the bestest friend i am, i made them a birthday so i can buy them things on that day. Please, tell your pet moth happy birthday on september 13.

Hey moth! I heard I heard it was your Moth Birbday today, woulda like to go buy some crush crush gems?!??!?!!!!???!?!!

by babyOil37377272 September 27, 2021

Halfy Birthday

Pleasantry phrase which expresses a wish for an enjoyable half birthday.

Halfy Birthday, dear Maureen.
Halfy Birthday to you!

by Kung Fu Jimmy April 24, 2022

topaz birthday

Topaz birthday is when the day of your birth is the same as your current birthday

I was born on a Monday and today i celebrate my topaz birthday which is also on a Monday

by amilili February 19, 2023

heavenly birthday

someone's birthday after they have passed away

"happy heavenly birthday to my brother, Kendall. today, he would have been 36"

by BatmanZoe March 5, 2023

4 day birthday rule

Rule that only applies to your closest bestest friends and gives them the power to bestow their birthday wishes not on your big day but within 4 days of you being born.

E.g. Hey Kate, couldn't wish you on your day but am calling now - I invoke the 4 day birthday rule.

by Burnerme December 1, 2018