Sleeper 

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"

Sleeper by 90sEraKuregi August 11, 2021

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.

Sleeper by Temu_787 September 26, 2022

Sleeper 

Someone who is asleep.

Synonym:

dormant
slumbering
resting
reposing
drowsing
comatose
supine
inactive
passive
inert
latent
fallow
quiescent
inoperative
stagnant
sluggish
lethargic
torpid
motionless
immobile
estivating

Why do you call the sleepers woke when they are infact in deep sleep? Are you trying to insult people using compliments?

Sleeper by Masterblou March 27, 2023

Sleeper 

A girl who resembles the lowest of lows and has no additional value other than sleeping with them. You could sleep to the fact of having a romantic relationship. Usually referred to in a negative context

“Nah I wouldn’t go for her, she’s a sleeper”

Sleeper by Odemanrondy August 22, 2023

sleeper 

a hoe.

she's a sleeper. she sleeps with many people

sleeper by issy b22 July 19, 2024

sleeper hit 

Generally any type of media that is marketed as under the radar, yet is of quality to have been a top tier marketing tool.

"That game is definately a sleeper hit, easily worth my twenty dollars!"

sleeper hit by Senior Twinkles May 28, 2006

sleeper car 

A car that has high performance but intentionally looks to be ordinary or even beat up. The polar opposite of a rice burner.

Did you see that sleeper car waste the Ferrari yesterday?

sleeper car by Napoleon the Clown July 12, 2006