from the GNU version of the Collaborative International Dictionary of English
- intransitive v. to fail of strength; to become wearied or worn out, as with labor; to give out.
- transitive v. To make pregnant. Often used in passive, "she got knocked up".
Sorry, no etymologies found.
Being loth to knock up the hotel people at so late an hour — for you must understand, sir, that we did not get to Slepe Rock until after midnight — we essayed the garage attached to, and/or erected upon, the yard where the lorries and motor coaches pull in during the daytime.’