When a person receives some fucky on there most special day
Chad : Happy Birthday baby I got you something close your eyes!
Kiersten: Oh Chad I love you what could it be?
Chad : AHHHHHHHH!
Kiersten: Wow it's your monster cock do I get some Birthday Sex?
Chad : Yes! Yes! Yes! Strip it down!
Kiersten: Uh! Uh! Uh! Uh! Uh! Uh! Uh! Uh! Uh! Uh!
Chad : Ah! Ah! Ah! Ah! Ah! Ah! Ah! Ah! Ah! Ah! Ah!

Chad : AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!
Kiersten : Yummy!
Chad : Happy Birthday To You!
by SlopNChop December 18, 2016
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"Damn, she is looking fat!"
"She just had some birthday sex"

"Aw the baby is so cute! What is his name?
"Birfday sexx"

"Welcome the the abortion clinic. What's hood nigga"
"I have a birthday sex problem..."
by big black sexy daddy h April 13, 2010
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This is a condition that occurs as a result of one person having a birthday. The song "Birthday Sex" will play in one's head the entire day, nonstop, and cannot be cured. this condition is made several times worse if the said person doesn't actually have sex on his Birthday.
Bill was found in his room, in the fetal position, screaming," I HATE YOU JERIMIAH" ... Birthday Sex Syndrome has claimed another victim.
by BirthdayGoneBad July 13, 2010
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if due to unforeseen circumstances if birthday sex isnt given upon someones birthday then late birthday sex is permitable because of the previous mentioned circumstances. now late birthday sex is exactly the same as birthday sex just on a different day than the persons actual birthday
Guy is extremely sick on his birthday. So girl cant give guy birthday sex without getting sick. So this girl decides to give guy late birthday sex. problem solved.
by gratspike February 9, 2011
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He wanted some birthday sex but was busy on his birthday so they had some postponed birthday sex the week after.
by melissayy! June 23, 2011
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An excuse to do the dirty on christmas day. May be used to avoid the wrath of God for sinning on his son's birthday.
John: Are you free tonight? I need a little christmas lovin, if you know what I mean...

Jane: I'm not sure God would ever forgive me.

John: Don't worry, it's jesus birthday sex. He'll take it as a compliment that we are celebrating His birth.

Jane: Ok! Let's do it!
by Jbislollipop23 December 26, 2009
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What I HOPE A NANCY DIDN'T GIVE MY MAN
I'm gonna give my mouth to Calendario on some birthday sex. Triple threat actually.
by ElectraHerz February 2, 2022
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