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 24, 2013

The term 'sleepers' is simply another word for 'pajamas'. Personally I think sleepers is a funnier phrase therefore I use it constantly.
by thekevin February 22, 2005

The Sleeper is a form of masturbation, when one sits on ones arm for a periode of time until the arm is numb. You then proceed to masturbate.
by tagger June 11, 2006

When you bring a girl home for sex and your roommate pretends to be asleep. After you and the chick really get into it, your roommate wakes up and joins in making it a threesome.
by kevinjay69 July 22, 2010

by Eloraborealis January 22, 2023

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."
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

I’m a sleeper
by Tegand1312 April 09, 2019
