knock up

To get someone pregnant.

Man, I really should've used a condom with her... I knocked her up!

by Brown Sugar March 21, 2003

knock up

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 4, 2004

knock up

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 26, 2005

knock up

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 29, 2004

knock up

to get a woman pregnant

If you don't use protection you will probably knock her up.

by Light Joker July 12, 2005

knock up

To knock up a guy means to fuck him in his asshole and have a cumgasm.

Matt always wants to knock up my asshole trying to make me pregnant because he says it would be fun to have a little skippy-boy running around, but I told him it doesn't work that way!

by eda-skip October 6, 2021

knock up

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 7, 2005