A stupid saying really; used as a reason to do something one might otherwise not bother doing
its ok dawg u can get f*cked tonite cos its yo birfday
by brendan March 21, 2004

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an excuse to smoke a fat sac and drink till u cant even stand and then just act totally retarded cause hey ITS YO BIRTHDAY! and no one can stop u, its like u turn into a super hero when someone states "it's yo birthday"
you: yo i dunno if i should drink tonight cause i have church in the morning
friend: nah fuck it, its yo birthday! GO (name here) IT'S YO BIRTHDAY!!!
by deenie June 17, 2004

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the day of you birth
hey shorty its your birthday
by Alex March 24, 2004

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yay for you

you get a prize

it's your lucky day!

you did good

I like you

you like that don't you
jack: omigod dottie, bobby-jean liked my film
and wants to screen it opening night!

dottie: It's your birthday! hay hay.
by Dottie March 23, 2004

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When something is lucky and is used to your advantage. Its a stupid term which I believe orignated from Rocket Power.
Sam just did an olly. "Go sam, its your birthday, its your birthday."
by Insane March 21, 2004

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Birth-day, hence conception-day, hence you're getting sex tonight.
"go shorty, it's your birthday." - 50 Cent
by ghoatie March 26, 2004

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A lyric from 50 Cent's (from G-Unit) song In Da Club. It is now used as a term of endearment between homies.
Lyric: Go shorety, its your birthday, we gon party like its your bitheday.

Endearment:
Homy 1: Aight man, peace
Homy 2: Yea, its your birthday!
Homy 1: Thanks man.
by Yo Mama's Pork March 26, 2004

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