Meaning

• To put together, fabricate, or assemble, particularly if done hastily or temporarily. See also knock together.

  "I'll just knock up a quick demo for the sales presentation."

• To awaken (someone) as by knocking at the door; rouse; call; summon; also, to go door-to-door on election day to persuade a candidate's supporters to go to the polling station and vote. See also knocker up.

• To exhaust; wear out; tire out; to fatigue until unable to do more.

• To become exhausted or worn out; to fail of strength; to become wearied, as with labor; to give out.

• To impregnate, especially out of wedlock. See knocked up.

  "I guess his summer plans are shot now that he knocked his girlfriend up."

• (racket sports) To gently hit the ball back and forth before a tennis match, as practice or warm-up, and to gauge the state of the playing surface, lighting, etc. See knock-up.

• To make even at the edges, or to shape into book form.

  "to knock up printed sheets"