To knock up Meaning, Definition & Usage

Definitions
  1. to fail of strength; to become wearied or worn out, as with labor; to give out. "The horses were beginning to knock up under the fatigue of such severe service." De Quincey. (b) to make pregnant (vulgar)
Definitions
  1. . (a) To arouse by knocking . (b) To beat or tire out; to fatigue till unable to do more; as, the men were entirely knocked up. Colloq. "The day being exceedingly hot, the want of food had knocked up my followers." Petherick. (c) (Bookbinding) To make even at the edges, or to shape into book form, as printed sheets. (d) To make pregnant. [vulgar: Often used in passive, "she got knocked up"]

Webster 1913