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Sleeper

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


Sleeper

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


Sleeper

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


Sleeper

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


sleeper

When you aren't sure if someone is retarded. Something just isn't right

At Megan's birthday party everyone wondered if Ben was a sleeper since he kept hitting his head against the wall.

by Guad or Ed's July 12, 2018


Sleeper

In online role playing games, a sleeper is a character created by a player that is soon abandoned by its player. The character technically lives on in the game world but never speaks, works or interacts with other characters because its player no longer plays him/her. As a result, the character is often deemed a "sleeper" by the active characters and ignored until he/she succumbs to starvation or some other form of character death in the game or less commonly the player has a change of heart and decides to start playing the character again.

This is how it usually goes.

A character named Argon is born or spawned into the game world.

Argon: "Hello everybody what can I do to help out around here?"

Random character: " Argon, we could use a guard to help defend the city, maybe a blacksmith."
Argon: "Okay, sure."

One or two weeks later.......

Random Character: That Argon fellow hasn't spoken in two weeks. He made a hammer and then fell a sleep. He's a sleeper sojust let him starve."

by PoppaJ81 June 22, 2015


Sleeper

Someone who you assume is just a normal guy because you only see him in hoodies and baggy jeans. Only to find out later when its summer that hes actually jacked as hell.

Friend1: Yo you know Jake?
Friend2: Yeah what about him?

Friend: Bro look at him on the beach.
Friend2: What the hell? Since when was he that jacked?!

Friend: He's a sleeper bro

by Sleeperagent1776 March 1, 2021