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sleeper
noun
Someone who sleeps.
"I'm a light sleeper: I get woken up by the smallest of sounds."
That which lies dormant, as a law.
A spy, saboteur, or terrorist who lives unobtrusively in a community until activated by a prearranged signal; may be part of a sleeper cell.
Synonymssleeper hit
verb
To mark a calf by cutting its ear.
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