It's boring. Puts you to sleep.
The term most likely derives from the twitch emote residentsleeper
"Dude, that new video game is so sleeper man. It was boring as hell ."
by Oh yeah yeah Oh yeah yeah June 20, 2020
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n. - A self-gratification method in which you sit on your hand for five mintues (until it falls asleep), and then rub one out. It feels like someone else is jerking you off.
She wouldn't give me any last night, so I just went home and did a sleeper.
by itsgr82day2 May 5, 2006
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A "professional" wrestling move where you put the lockdown on someone's face in an attempt to cut off the air supply to their brain. Since this type of wrestling is fake as shit, the "sleepee" then pretends as if he/she has "gone under". This usually involves acting like your body has become totally limp and even taking it to the point of fake snoring. News alert: in reality, if someone cut off the oxygen to your brain, you wouldn't be snoring, you'd be fucking dead.

The executor of the sleeper (upon putting his opponent under and the ref ringing the bell) then jumps up, prances around the ring in victory and then humiliates his opponent by any of the following: leg dropping him/her; ripping a juicy fart in opponent's open mouth; depantsing him/her; writing embarrassing sayings (in marker) on his/her bare skin; pulling a "snake" out of a bag and laying it on his/her face; etc.

At some point during the humiliation of the opponent, the sleepee's posse (who has obviously been watching from the dressing room) comes charging out to the ring, intent on kicking the executor of the sleeper hold's ass. After a couple closelines and head butts, the sleeper holder usually slides out of the ring (without suffering much damage) and retreats to the dressing room, taunting the crowd and the posse in the ring, every step of the way.

Once all trouble has been cleared out, the sleepee is then put on a stretcher and dramatically carried out of the area.
Holy shit, I can't believe Rowdy Roddy Piper just put the fucking sleeper on Jimmy Supafly Snuka.
by Wang Newton March 12, 2005
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Usually used when describing a movie, especially one that seems boring, mundane, or overdone--but it ends up becoming a huge hit. From what I understand, the original "Dirty Dancing" was a sleeper hit.
Listen to the end-of-the-year movie reviews. Chances are that someone will mention "the sleeper hit of the year."
by Candice February 28, 2004
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A girl who is usually unattractive and after a few years "grows in" to herself and seems attractive.
Remember Jamie? That girl who we used to bark at in Middle School? I never thought she would be a sleeper.
by LOLBOI April 24, 2007
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railway car with sleeping berths and/or bedrooms ("roomettes")
I had a sleeper from Winnipeg to Ottawa.
by Jake March 25, 2004
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A girl who is plain and average looking that you would not give a second look at but if you sleep with her, you find out that she has an incredible body and is exceptional in bed at pleasing a man.
Mary Jane is a sleeper. We ended up sleeping with each other after getting drunk and partying at Jed's party. She is awesome in bed and has a hard body.
by WordVancouver November 25, 2013
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