Knocked up

[Becky]

To get someone pregnant

[Becky]

to get pregnant; an unplanned pregnancy, unwanted.

[Sarah]

To get a woman pregnant, perticually un-planned, un-wanted or in wedlock.

[Rihanna]

1.When a man gets a women pregnant, usually not planned.

[Justin Bieber]

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.

[Couch Potatoe]

usually when a female doesnt marry and becomes pregnant at a young age

[Jason Yan]

Australian lingo for tired or [pooped out].

[Rihanna]

Pregnant out of wedlock, Bearing a bastard child.

[Dorothey Allen]

Players knock up before beginning a game of tennis or similar sport by hitting the ball to each other: