Sleeper cell 

A girl or boy who was very unattractive in high school and has otherwise become unbelievably hot in college or beyond.

Oh my gosh Josh is such a sleeper cell! He was never even remotely cute in high school.. Now look at that!

Sleeper cell by Red1920 July 24, 2014

Sleeper cell 

When a buddy is hanging with you and starts talking to a girl, then throws you under the bus to try and get some from her. He turns his back on his boys to further the chase.

Jake just went sleeper cell on me and Jethro at the bar to get after the married chick.

Sleeper cell by bigdust13 January 13, 2010

Sleeper Build

A PC with an external case (if desktop) or shell (if laptop) that appears incredibly outdated, but when opened, contains modern parts, and when turned on, runs a modern operating system.

Some guy broke into my house last night, but luckily he never took my PC.
Oh yeah, that's probably because you have a sleeper build.

Sleeper Build by dreggsome August 16, 2021

Sleeper Dick 

A drawing of a penis in another persons school book that is drawn far through the book so that it is designed to be found and cause shock weeks or months after it is drawn, much like a sleeper agent.

Harry discovered the sleeper dick in his physics workbook, three months after we drew it.

Sleeper Dick by The Magi Carpy May 17, 2015

sleeper creeper

The act of smoking bud before going to bed. This will give the smoker a strong mid night snack appetite and a long and satisfying sleep.

Yo dude, you wanna meet up for a sleeper creeper, I need to get a really good night of sleep tonight.

sleeper creeper by Maba February 1, 2007

sleeper cell 

this happens when you stay the night at someone's house, and the next morning while in the shower; you accidently cum on the louffa hanging from the faucet.

"she doesn't know how she got pregnant, must have been a sleeper cell"

sleeper cell by 1/2RICAN November 11, 2009

Sleeper Ring 

This type of ring is made of sterling silver or metal. Worn for one purpose only, to knock people out. Normally worn on the middle finger of both hands.

Brass knuckles are illegal in my state, so I bought a sleeper ring.

Sleeper Ring by tylerthetiger October 21, 2010