a slender, flexible shoot, rod, etc., used especially in whipping or disciplining.
2.
an act of whipping or beating with or as with such an object; a stroke, lash, or whisking movement.
3.
a slender growing shoot, as of a plant.
4.
a hairpiece consisting of a bunch or tress of long hair or some substitute, fastened together at one end and worn by women to supplement their own hair.
5.
Electricity. a device for turning on or off or directing an electric current or for making or breaking a circuit.
to whip or beat with a switch or the like; lash: He switched the boy with a cane.
12.
to move, swing, or whisk (a cane, a fishing line, etc.) with a swift, lashing stroke.
13.
to shift or exchange: The two girls switched their lunch boxes.
14.
to turn, shift, or divert: to switch conversation from a painful subject.
15.
Electricity. to connect, disconnect, or redirect (an electric circuit or the device it serves) by operating a switch (often followed by off or on): I switched on a light.
asleep at the switch, Informal. failing to perform one's duty, missing an opportunity, etc., because of negligence or inattention: He lost the contract because he was asleep at the switch.
c.1611, "to strike with a switch," from switch (n.). The meaning "turn off or on" is first recorded 1853, of trains on tracks, 1881 of electricity, 1932 of radio or (later) television. Sense of "shift, divert" is from 1860. Meaning "to change one thing for another" is recorded
from 1919. Switch-hitter is 1930s in baseball slang, 1956 in the sense of "bisexual person." Switchback in ref. to zig-zag railways is recorded from 1863.
n. a switchblade knife. (The folding pocket knife springs open when a button is pushed.) : They found a switch in his pocket when they searched him.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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