Dictionaries:
knock up:
1. In America and, to a lesser extent, in England, to make a woman pregnant . See pregnant for synonyms.2. In England, it also means to tire out , to exhaust oneself. Etymology. Introduced in England around the 16 th century from a derivation of knock meaning to copulate .
See Also: FUBAR, knock, knock one on, Snafu, up and down
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