To get someone pregnant
Amanda got knocked up because Jimmy didn't use protection.
to get pregnant; an unplanned pregnancy, unwanted.
fuck yo! i just knocked up this bitch, now i gotta pay child support!
To get a woman pregnant, perticually un-planned, un-wanted or in wedlock.
Ironicly, my radical femminest english teacher came in knocked up today.
to get someone pregnant, generally unplanned.
jack had sex with with me, unprotected and now i'm knocked up..
To impregnate a lady..
"Lucy got knocked-up by Jeff.."
1.When a man gets a women pregnant, usually not planned.
Hey Jessica you look sad what wrong?
2 person: Well, I'm pregnant!
1st person: "oh shit girl you got knocked up."
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