No sleeper

Someone who is woke and aware of everything that is occurring around them

Billy-"Matt you high as a kite last night in Friday's watching the game and you were still able to realize that our waiter took an hour to come to our table to take our orders."

Matt-"no sleeper brah."

by Derogatory term June 14, 2018

Sleeper Peeper

Someone who takes videos or pictures of another person sleeping.

Ian: (sends video of man head on his arms over a table with his bare feet crossed) captioned: Good Night Prince

Joe: Your such a sleeper peeper lol

Ian: I've killed a man for saying worse, you watch your back guy.

by Claude Sundae June 29, 2018

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’s breath

The pungent odour emitted from one’s oral orifice following a prolonged period of time closed whilst in deep slumber

‘Fletch, get away from me. You’ve got bare bad sleeper’s breath’

by X-Tina2 July 15, 2018

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 May 23, 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 hit

A type of media that found success years/months/weeks/days after its release.

Duncan Laurence’s Arcade, which is a song, is an example of a sleeper hit. It represented the Netherlands (and also their winning song) at the 2019 Eurovision Song Contest and later went viral on TikTok in 2021.

by thecharacterwannie September 28, 2022