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Man, I really should've used a condom with her... I knocked her up!
knock up by Brown Sugar March 20, 2003

knocked up 

when a guy gets you pregnant by accident , whoopsies
felisha: man i’m feeling so sick today kylie

kylie: omg babe are you knocked up???
felisha: oh SHIT !

*dramatic head turn*

knocked-up 

"Lucy got knocked-up by Jeff.."
knocked-up by Leeeeeeena September 23, 2005
1.(North America) V. To get Pregnant
2.(Great Britain) V. To wake up
"Billy go and knock up your sleppy head brother."
knock up by GMan January 3, 2004
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.
knock up by katiecutie153 December 25, 2004

knocked up 

to get pregnant; an unplanned pregnancy, unwanted.
fuck yo! i just knocked up this bitch, now i gotta pay child support!
knocked up by master p March 3, 2005