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
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."
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
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
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
An old terminology of a stake big long bit of wood with tar on the bottom to hold fencing in used in farms Sometimes is called a sleeper or railway sleeper. To hold custom fencing up 1 stake some tacks and a bit of chicken wire.
Sleeper noun "Here is the sleeper place it in the ground upright and start hammering it into the soil"
by 90sEraKuregi August 11, 2021
Not just sleep. It's the most comfortable and cozy nap ever. Just curl up in a little ball and shut out the world.
by Luxleigh July 3, 2019
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.
by trhsrthsrh April 7, 2021
In car terms, a sleeper is any car that only has performance modifications and no visual mods. AKA "All bite and no bark"
A sleeper is the complete opposite of a ricer.
A sleeper is the complete opposite of a ricer.
(Btw, the sleeper here is the 350Z Driver)
Ricer: "LOL, look at that 350Z. It suxxx. Mah Civic is better in EVERY WAY POSSIBLE."
Z Driver: "I see you're challenging me to a race."
Ricer: "Yo, imma show yo the real power of zis Civic. We race. And I shall win. I'm serious."
Z Driver: "Don't even try. I've got more important matters to attend to--"
Ricer: "YOU SHUT UP! WE'LL RACE, AND I'LL WIN, AND I KNOW IT."
-a little while later-
Ricer: "Goddamn it! YOU N00B! GET BACK HERE FOOL"
Z Driver: "No u."
(Z Driver drives away doing the "lol internet")
Ricer: "LOL, look at that 350Z. It suxxx. Mah Civic is better in EVERY WAY POSSIBLE."
Z Driver: "I see you're challenging me to a race."
Ricer: "Yo, imma show yo the real power of zis Civic. We race. And I shall win. I'm serious."
Z Driver: "Don't even try. I've got more important matters to attend to--"
Ricer: "YOU SHUT UP! WE'LL RACE, AND I'LL WIN, AND I KNOW IT."
-a little while later-
Ricer: "Goddamn it! YOU N00B! GET BACK HERE FOOL"
Z Driver: "No u."
(Z Driver drives away doing the "lol internet")
by N00berman October 22, 2011