A very daring sex move; occurs when a male receives oral sex and fails to notify his partner of his impending orgasm, during the course of his shenanigans, the male discretely pulls out a happy birthday hat, confetti, and noisemaker. At climax the male then proceeds to blow into the noisemaker, aim his load on his partner's face, yell surprise and throw the confetti in the air. You get extra points if you get the confetti to stay on your partner's face with your splooge glue.
by B.Malones February 9, 2008

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

"So I went into the backroom of this bar and there was a girl, a german shepherd, a towel on the floor and a guy undoing his belt. Then the barmaid handed me a glass of absinthe and that's when I knew I'd been invited to a belgian birthday party."
by Stovaa June 8, 2018

A Purple milkshake made to celebrate the 52nd birthday of Grimace.
*WARNING* Could cause death if indigested
*WARNING* Could cause death if indigested
Guy 1: oooh Boy! I can't wait to try Grimace's Birthday Shake!
Guy 2: I don't think you should drink that
Guy 1: Nonsence. I bet it's fine.
*Takes a sip*
Guy 1: See, I was right. And it tastes Good-
*Dies on the floor 5 seconds later*
Guy 2: I don't think you should drink that
Guy 1: Nonsence. I bet it's fine.
*Takes a sip*
Guy 1: See, I was right. And it tastes Good-
*Dies on the floor 5 seconds later*
by MDawg1491 June 27, 2023

by kbra24 December 7, 2014

Person 1: My boyfriend’s birthday is coming up, I’m hoping to do something fun
Person 2: You should give him the Soukoku Birthday Special!!!
Person 1: You’re so right!!!
Person 2: You should give him the Soukoku Birthday Special!!!
Person 1: You’re so right!!!
by 𓆟 March 29, 2023

a condition in which ones birthday (or month) is approaching so the person in question completely ignores everything in life except his or her upcoming birthday. Constantly reminding others that his or her day is approaching, planning their own parties, suggesting gifts, and changing the subject of every social conversation in to something about said birthday.
Guy: "Greg's birthday is coming up, are you going to his party?"
Girl: "How can you not? He's only reminded me every day since last month and invited me to his 3 parties he planned for himself. His narcissistic birthday syndrome is in full swing."
Girl: "How can you not? He's only reminded me every day since last month and invited me to his 3 parties he planned for himself. His narcissistic birthday syndrome is in full swing."
by quixilver09 January 11, 2017
