The act of having yourself photograghed naked while pregnant as a form of "art"

OR

The 4D ultrasound to determine the sex of a baby with an arrow pointing to the genitals.
I see by the arrow on your unborn porn that you're having a boy!
by Melikim January 21, 2011
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The act of entering the vagina of a pregnant woman with your penis and then sucking the unborn fetus into your urethra.
Karen, I think I changed my mind. We gotta unborn cock vore it.
by NerdyBoyo June 09, 2019
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another term for a mans semen,
Earnit shot his unborn babies all over Jared face after recieving oral pleasure from him.
by stewy-sapimpida-14 March 06, 2003
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"UBF" An unborn fart found on a stomach xray...
There are 5 unborn farts on your xray
by Kuehlstein December 22, 2017
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The NEW version of 'Your Mom!'. Because everyone knows that saying is getting old. So come up with something fresher like 'Your Unborn Brother!' It's totally random and will leave your friends confused and awestruck from you witty originality.
Q: What's the answer to #9?
A: Your Unborn Brother!
Or
Q: Who's the new choir teacher?
A: Your Unborn Brother!
by H Nicole M January 13, 2009
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