a person who is an outwardly common looking item, but possesses something special or unique inside
Cyndi turned out to be a sleeper, I thought she was just a bar fly but she has an M.A.Sc. in Electrical Engineering and owns half a restaurant with her youngest uncle.
by Jake March 25, 2004
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someone who has the potential to get hot so later someone can smash
hey, you see that kid Kyle over there he must be a sleeper
by Justinbrooks99 December 19, 2017
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A chick that you don't think is hot at first, but after a period of time, you come to the conclusion that this girl is very hott.
Yea, this girl is a sleeper. I didn't think she was hot at first, but after a brief period of time, I came to the conclusion that she is very hott.
by Ryaun December 10, 2006
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a terrifying movie featuring kevin bacon as the worlds scariest detention center guard
kid: What do you want?

kevin bacon: A blowjob. down on your knees.

if you want to not sleep at night, watch sleepers
by clevelandsteamer October 2, 2005
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The last little bit of your weed, Usually the last bong hit you take right before you go to sleep at night.
"Dude, I can't sell you any bud right now. All I have left is a sleeper."
by Biff Ripster May 4, 2009
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What you call someone when they are tired or sleepy
Her: “I’m tired
Him: “you better wake up ya sleeper
by ALOEA December 27, 2022
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(n) {Aust., N.Z.,} small hooped earrings of any alloy, the kind that snaps together to form a complete ring.
I bought a pair of new gold sleepers today.
by SatyrD August 15, 2005
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