to get someone pregnant, generally unplanned.
jack had sex with with me, unprotected and now i'm knocked up..
by smile.- November 26, 2008
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To get a woman pregnant, perticually un-planned, un-wanted or in wedlock.
Ironicly, my radical femminest english teacher came in knocked up today.
by BigFishyBob March 25, 2007
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"Knocked up" is slang for "Impregnating"

Though it is generally used negatively, in certain "ghetto" settings, it is a compliment to tell a girl her boyfriend knocked you up. No one is sure why, but many believe it is a compliment for implying that said boyfriend is attractive/sexually potent.
"You're flyboy got me knocked up/impregnated me"
"Thanks, girl! He is a looker!"
by mj tragic February 6, 2014
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usually when a female doesn't marry and becomes pregnant at a young age
Guy: Where's Lucy?
Father: She got knocked up, so shes getting an abortion
by cowkilla224 August 24, 2009
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Fucking a girl hard. Cumming in her probably slutty pussy.. Getting her pregnant. Good job dumbass!
You fucked, broke the condom, filled her to the brim with cum, got her knocked up...
by fortybuckle5859 October 30, 2018
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Australian lingo for tired or pooped out.
"I just ran a mile and I'm totally knocked up now!"
by demon_panda_sauce July 2, 2009
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