to get a girl pregnant out of marriage(to get pregnant)
It is bad to get knocked up, you know that baby is gonna be messed up.
by katiecutie153 December 25, 2004

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Top Definition
To get someone pregnant.
Man, I really should've used a condom with her... I knocked her up!
by Brown Sugar March 20, 2003

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1.(North America) V. To get Pregnant
2.(Great Britain) V. To wake up
"Billy go and knock up your sleppy head brother."
by GMan January 03, 2004

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to get a woman pregnant
If you don't use protection you will probably knock her up.
by Light Joker July 12, 2005

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To get someone (usually a female) pregnant.
Danny: "I guess I should've used a condom last week..."
Mike: "Dude you can't go around friggin' knocking up ten-year olds!"
Danny: "There's no statutory rape law in Maine."
by The Ugly One January 28, 2004

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A bitch, or a slut. Also can be a prostitute or whore.
The woman on the street is a knockup.
by Zach January 18, 2005

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To implant semen in the womb for the purpose of uniting with an egg to form a fetus, therefore stopping menstruation and causing the body to expand as the fetus grows.
The purpose of Tyrone forcing sex on Brie Ann, the prom queen, was to knock up the queen and also to knock her off the throne and change her attitude. Brie Ann had been rubbing him the wrong way for months. Now she could think about this for years.
by Richard Black April 07, 2005

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