Etymology
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rip-off (n.)

"an act of fraud, a swindle," 1969, from verbal phrase rip off "to steal or rob" (c. 1967) in African-American vernacular, from rip (v.) + off (adv.). Rip was prison slang for "to steal" since 1904, and was also used in this sense in 12c. The specific meaning "an exploitative imitation" is from 1971, also "a plagiarism." Related: Ripped-off.

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turn-off (n.)
"something that dampens one's spirits" recorded by 1971 (said to have been in use since 1968), from verbal phrase turn off "stop the flow of" (1850), from turn (v.) + off (adv.). Turn-off (n.) as "place where one road diverges from another" is from 1881.
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off-scouring (n.)

"rejected matter, that which is vile or despised," 1520s; literally "that which is scoured off;" from off (prep.) + verbal noun from scour (v.1) "cleanse by hard rubbing."

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off-rhyme (n.)

"partial or near rhyme," 1938, from off (prep.) + rhyme (n.).

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oftentimes (adv.)

"many times, frequently," late 14c. as two words, early 15c. as one, an extended form of often, with adverbial genitive -s. Earlier was often-tide (mid-14c.); oft-times is from mid-14c. Middle English had also ofte-sithes, from Old English oft-siþas.

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send-off (n.)

"a farewell" (especially a funeral), 1872 ("Mark Twain"), from the verbal phrase send off "cause to be sent" (attested by 1660s), from send (v.) + off (adv.). Earlier a send-off was "a start," as on a journey or race (1841), hence "a display of good-will on the occasion of such."

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set off (v.)

verbal phrase; see set (v.) + off (adv.). From 1590s as "make prominent by contrast," 1610s as "adorn." Intransitive sense of "start on or as on a journey" is from 1774. Meaning "separate from contect" (in typography) is from 1824; sense of "ignite, discharge, cause to explode" is from 1810.

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shut-off (n.)

1869, "something which shuts off;" 1889, "cessation of flow," from the verbal phrase, which is attested from 1824, "turn off, prevent the passage of (gas, steam) by closing a valve, etc."

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beat off (v.)

"drive (something) away by violent blows," 1640s, from beat (v.) + off (adv.). The meaning "masturbate" is recorded by 1960s.

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well-off (adj.)
1733, "comfortable," from well (adv.) + off. Meaning "prosperous, not poor" is recorded from 1849.
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