sleeper effect

The modification of a car or truck purely for performance gains, while leaving the outward appearance unchanged.

Are you going to keep the chrome tip on your performance exhaust system?

no I'm going for the sleeper effect.

by Dastoymaker December 3, 2007

sleeper dime

A good-looking person who is not given proper recognition. A dime whos looks are often over-looked.

Mary: You know, John is looking kind of fine tonight.

Jane: You're right, he's a total sleeper dime

by lia12345 May 25, 2009

slevering gnome

A person at work who goes around telling unbelievable lies and stories they have heard from others and pass other peoples ideas off as their own.

I'm sick of that wee slevering gnome stealing my ideas!

by wonderdood October 20, 2011

Sleeper cute

a person that isnt conventionally cute/hot in personality or looks but still managed to get under the radar

That guy Jeremy is kinda sleeper cute ngl

by dork of Oz December 6, 2020

sleeper fag

A secret gay; no one knows they are gay unless they tell them

Person 1: “Hey, is John gay?”
John: “No, I’m a sleeper fag.”

by Enryu March 9, 2021

shit sleeve

The rectal wall

Man, my shit sleeve has been backed up for weeks!

by Richard Hawkins May 22, 2004

boner sleeve

Slang term used to describe a condom.

Phil: So ... you nail that cute bit of ass last night?

Jo: Nah man, didn't have a boner sleeve on me. Aint worth it in case I catch me some skank cooties, or get the biatch knocked up.

by TMA-1 July 28, 2011