When a girl doesn't wear underwear while sleeping. Has her pussy out
Stim: Yeah man, I walked into nykiah's room and tried waking her up.. she had NO pants on, she's a pussy sleeper..
by IRADIATEYOUHOES January 8, 2021
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Slipping sleeping pills into an alcoholic beverage and give that to their date and have sexual intercourse with them without them knowing it.
Bill was mad at his girlfriend hasn't had sex with him in a long time so he gave her a Bill Cosby Sleeper.
by dustylicious October 29, 2015
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When a girl is not a "Fuck and chucker" and worth keeping around because she is awesome.
I'm not sleeping with you till date 5/6 , I want to know you're not a "Fuck and chucker"

...i'm insulted you would even say that, you're clearly a "sleeper and keeper"
by Aljolympics April 4, 2016
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A car that looks like a ordinary car on the outside and fast on the inside.
Person 1: I drive a 2001 Honda Civic
Person 2: That isn't fast!
Person 1: That is a sleeper
Person 2: What does sleeper mean
Person 1: A car that looks like an ordinary car on the outside and fast on the inside.
by Theguy86 August 11, 2021
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A mark ass bitch; someone who is a overall messy bitch but didn't show their true colors initially
Damn, dude Jess is one big sleeper for cheating on her man
by ScamuelJackson July 15, 2016
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A type of car guy with a normal, stock looking car (like an everyday person would have), but the performance of it is intense; simply the undercover of the car community.

These people will

1. Focus on all go, no show.
2. Hunts down rich douchebags in their supercars, who brags about it being "faster"
3. Modify their car's performance (Turbo, Intake, tires, etc)
4. Be the most unexpected when law enforcement gets included
The imbecile in the Ferrari 360 is to late to realize the Volvo 242 with the roaring V8 was a sleeper car
by DeadassDefs April 8, 2018
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I term used by serious car guys to describe a vehicle that is plain and boring looking but is really fast as shit. Basically it’s a car designed to look like something your grandmother would drive but it has a big bad ass 5.0L V8 engine under the hood.
That 5.0 Hyundai Genesis R-Spec 4-door sedan is a straight up sleeper. It has 440 hp and my grandma loves driving it because it’s easy to drive.
by Temu_787 September 26, 2022
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