Secret sleeper

Someone who has consumed a large amount of alcohol and suddenly leaves the room or party to pass out without notice.

That Luther is always a secret sleeper, disappearing in the middle of the party.

by Modkrew16 December 28, 2013

Sleeper

A part of the cab or an attachment to a semi-truck often used for loads that travel a far distance. The sleeper contains one or two beds that are of decent comfort (in my opinion) especially with blankets. For two-person trucks, there is usually a bunk bed so that you and your passenger can sleep.

Driver: "We only have an hour left, we need to go to the sleeper"
Passenger: "Ok."

by trhsrthsrh April 7, 2021

Star Sleeper

Someone who saves their virginity for a celebrity. They truly believe that at some point in their life, they will have a chance to fornicate with said celebrity.

Gabby is such a star sleeper. She won't stop talking about how she wants to bang Liam Payne from One Direction

by GabAram March 20, 2012

Sleeper fatty

aka night boner

I had the horniest dream! I woke up and had a total sleeper fatty!

by Bagman_3k December 12, 2024

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 Abs

concealed or nonvisible 6 or 8-pack abs that are only visible when abs/core are used or flexed.

They have nice sleeper abs.
He has nice sleeper abs.
She has nice sleeper abs.

by aaron1597 July 26, 2023

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 30, 2015