Something a female figure (i.e Mother,Sister, Step-Sister, Lesbian Friend, and or Wife/Girlfriend) give a male figure for their birthday. It is an act of sucking the "cock" aka the Penis on their birthday. And since its the male figures birthday, they get to have their way with the female figure (i.e rough and tough)
Hey Sally it's Jareds birthday!
Oh does that mean I have to do Birthday Cock?
Oh yes, yes, yes. And its going to be fun.
Oh does that mean I have to do Birthday Cock?
Oh yes, yes, yes. And its going to be fun.
by SovietMcDonalds November 25, 2018

by socksrocksocksrock March 21, 2010

The most epic day in which the epitome of greatness was descended upon this realm. The day D-Mill was crafted into historical wonder!
by ShadowWitch May 20, 2023

My soul's birthday is the summer of 1981 when I heard Van Halen's fourth studio album "Fair Warning"
by The Interesting November 11, 2022

The rule stating that if you are dating someone or "talking" to that person, you cannot make them choose any plans for future engagements within 10 days of their actual birthday. UNLESS that person requests to make the plans. All other plans must be made by the person whose birthday is not within 10 days.
Dylan: Caroline, you have to make the plans for what we do tomorrow.
Caroline: No I don't you ginger, my birthday is in 8 days and its the birthday rule that everyone knows.
Caroline: No I don't you ginger, my birthday is in 8 days and its the birthday rule that everyone knows.
by duhofcourse December 21, 2010

Birthday Boy“I was born at 2:21 PM and I’m 21 today, therefore its my Ruby Birthday”
Particularly annoyed person “Piss off nerd.”
Particularly annoyed person “Piss off nerd.”
by Slimyundercookednyquillchicken August 6, 2023

The best day of the year! The most beautiful girl on the planet was born on this day and you got to celebrate!!
November 1st is the date and don’t forget it.
November 1st is the date and don’t forget it.
by The Boyfriend Matty B. October 31, 2021
