the act of causing something to move up and down (or back and forth) with quick movements
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addiction
being abnormally dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs)
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accusation
an assertion that someone is guilty of a fault or offence; "the newspaper published charges that Jones was guilty of drunken driving"
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abuse
a rude expression intended to offend or hurt; "when a student made a stupid mistake he spared them no abuse"; "they yelled insults at the visiting team"