Sleeper

Referring to a car, it is a car whose cosmetics look like it's stock and slow and one assumes there is a small engine under the hood. Only when it is challenged by a ricer or another car, it shows its mighty by leaving the other car in a cloud of smoke because it has either a huge engine from the factory or has a swapped engine from a bigger car or has tons of engine modifications.

A sleeper is is the perfect example of this acronym "All bite, no bark."
It is a sleeper dude, that is what it meant to do, shock you by its speed and power you never thought it had.
by Sleepers are the S*** July 15, 2011
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Sleeper

A person who enjoys sleeping and sleeps all the time.

I am a sleeper
by Tegand1312 April 09, 2019
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Sleeper

A heavy punch delivered that knocks out the opposing side in one hit.
Taylor swift would've thrown an absolute sleeper if her and Kanye actually stepped in the ring.
by Golden Peggy March 22, 2018
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Sleeper

A creature, in this case a human, who frats so hard he occasionally (always) falls asleep in whatever frat pose/location he finds himself in.
"Hey check out the sleeper"

"Oh, standard.... Lets take pictures of shit on him, like beer cans, asses, and sorority girls and put them online"
by Mr. Fletcher June 06, 2013
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Sleeper

(n) Woman who invites herself into your bed, when morning comes does not leave, does not acknowledge subtle hints to leave, makes herself at home. (Editors Note; Sleepers natural evolutionary path is into Bunny Boilers; when one is encountered it is advisable to cease and desist any and all communication while still possible before life and family jewels are still entact)
"Dirk, where are you? Your late, your going to miss the game"
"Sorry, I am having trouble getting this 'Sleeper' out of my house"
by Dirk Longfellow June 13, 2006
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Sleeper

Someone who falls asleep fast , usually right after sex .
I brought this fine girl home last night and when I tried to go for round 2 i learned she's a sleeper !
by teehee1415 June 26, 2011
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no-sleeper

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 01, 2014
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