Antiques or jewelry items that have been stolen and hidden away. Chiefly of British usage, a sleeper is an item of antiquity, generally of known provenance, stolen and cached, sometimes for years, until it can be sold to a private buyer or exchanged.
"A sleeper is an item that has been deliberately hidden, usually because it is hot." Lovejoy, "To Sleep No More," 1987.
by eric_catchpole September 20, 2008
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It's a type of shot. equal parts vodka, Nyquil and red bull.
The party sucked so we started doing shots of sleepers. Best party ever!!!!
by the class clown May 13, 2013
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it when a person sleeps alot or when a sleeps on a double sleeper
fred is a akways so he sleeper

mary sleeps on a double sleeper
by never mind February 15, 2005
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An alcoholic drink consumed for the purposes of assisting in inducing sleep.

The opposite of eye-opener.
"As long as everyone's calling it a night, how about a sleeper?"
"You bet."
by Kroxman October 28, 2007
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a person who has too much sleep. dont mess cuz they r too cranky and will beat u up with a stick, machine gun, sword, machetie, or a cat. loves atackin with the cat.
"my bro is such a sleeper. he hit me in the head with a cat."
by H3R0 B01 May 12, 2006
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A no-sleeper is the corporate equivalent to a no-hitter - a presentation in which nobody dozes off.
Kurt had a no-sleeper going until he got to the financing options slides - then he lost it. Badly.
by PsychoPuppyDad August 1, 2014
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Large, beautiful breasts that are keep well consealed and initially appear to be much smaller and less impressive than they actually are until unleashed.
I think Alicia may have some real sleepers.
by KABT October 27, 2007
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