When an adult (usually male) attempts to return to the womb when life becomes too hard.
"He tried to climb through my vagina to get to live in my womb!! He's a grown man, he should know reverse birth is NOT on the cards!"
by manicbubble February 11, 2015
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When you have a girl laying down with her legs spread and she's in missionary position and you place a slip n' slide leading to her pussy and you slide in
Bro Jacob, my girlfriend let me do a reverse birth to her and it took me 2 hours to find my way back out!
by I_fapp_2_handed December 17, 2019
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A reverse birth (also know as Baby Dildo), is the act of pleasing a stubborn, unpleaseable woman, by taking a newborn and sticking it back into the vagina, inevitably giving her an orgasm.
"Dude, that bitch? Nothin' was gettin' her off. So I gave her a nice baby dildo and she finally appreciated what I was doing for her."

"I felt bad about fuckin' her man, you know after her husband died? So I figured I'd involve her kid, and I helped her reminisce. I totally gave her a reverse birth."
by ladiesman23 October 16, 2009
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To acquire ownership of something, usually incarnate, by forcefully pushing said object into ones vagina (or anus) then subsequently pushing it out in an act of "birth." This is commonly done, but not limited to, aesthetically pleasing children that you wish to make yours.
"Oh Alex!!" Laura said with utmost excitement, "Isn't baby Benji larsman S00 cute! I will make him my own flesh and blood by reverse birthing him!"
by thed00d! October 11, 2008
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A specific act involving a midget, a woman, and a 100-foot slide-and-slide. The woman lays back at the end of the slip-and-slide with her legs wide open. The midget then is slid down the slip-and-slide at a high speed, resulting in the midget sliding all the way down the slip-and-slide, and going so far into the woman's vagina that it ends up entirely inside of her, resulting in what looks like a birth in reverse (hence the name, reverse birthing).
The festival ended with a complete reverse birthing. It was epic.
by AM0408 July 13, 2012
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n. The sexual act of inserting your head into your partner's vagina. Best if done wearing a heavily lubricated swim cap. Also used as a verb.
n. That bitch is so loose, even Charlie Brown could hit a reverse birth on her.

He tried to reverse birth Giggles, but she was just too tight.

or

The last time I reverse birthed a girl, my swim cap got stuck up there.
by Elliot Simon March 14, 2005
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To acquire ownership of something, usually incarnate, by forcefully pushing said object into ones vagina (or anus) then subsequently pushing it out in an act of "birth." This is commonly done, but not limited to, aesthetically pleasing children that you wish to make yours.
"Oh Alex!!" Laura said with utmost excitement, "Isn't baby Ben S00 cute! I will make him my own flesh and blood by reverse birthing him!"
by thed00d! September 7, 2008
Get the reverse birth mug.