Sheeped 

To send email from another user's account, notifying the world that this person has broken computer security policy by walking away from their computer and left it unlocked.

"Erin must have gotten sheeped! I just got an email from her saying she loved sheep and wanted to find some sailors to share them with!!"

"I'm a little teapot and I love SHEEP!"

Sheeped by rgillies May 15, 2009

Sleeper Tunechi

An individual who goes to sleep listening to music

The sleeper tunechi put their headphones in and went to bed.
Dan is a sleeper tunechi because he always has his stereo on as he falls asleep.
I am the best sleeper tunechi because i have dre beats.

Sleeper Tunechi by Dand31ion July 9, 2011

Floor Sleeper 

Someone who mooches off of a friend by constantly spending the night and eating his food, smoking his weed, and leeching his internet. Since there is no place to sleep, the moocher sleeps on the floor, hence the name "Floor Sleeper"

Nick "Hey Mark can i spend the night?"
Mark "Sure Nick"
Ben and Andrew together " FLOOR SLEEPER!"

Floor Sleeper by Major Mandrew July 23, 2012

sleeper 

Outwardly common looking item, that possesses something special or unique inside.

That boring looking car is a real sleeper with that big turbo hiding under the hood and nary a sticker or scoop to be seen anywhere on it.

sleeper by sageoneon March 7, 2003

sleeper 

someone who secretly is badass at something but doesnt let anyone know

guy 1: im literally boutta destroy him at insert game/activity
guy2: oh no man dont do that hes a sleeper at that game/activity

sleeper by JavaLime May 1, 2020

Sneaky Sleepers 

The act of ejaculating all over a friend or roommate's bed when they are out with the key being not telling them when you have committed the act till a much later date.

Can be used as a very credible threat.

"My brother didn't want to let me use his PS3 so I gave him some sneaky sleepers"

As a threat,

"Pay your half of this month's rent or i'll leave you some sneaky sleepers"

Sneaky Sleepers by xovut April 7, 2009

Sleeper boobs 

large breasts that are cleverly hidden, most of the time

Damn Eric, Jane is totally rocking the sleeper boobs under that big bulky sweater...she thinks she's hiding them

Sleeper boobs by Dirt Rider June 2, 2009