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!
by Red1920 July 24, 2014
"don't fear the sleeper..."
by Black Belt Jones September 18, 2003
A back-sleeper is a guy who sleeps on his back in a gay bathhouse room so dudes who enter know he wants to be sucked off.
by USAF Cadet September 02, 2021
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.
by bigdust13 January 13, 2010
by Sophia is a sock sleeper January 21, 2018
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.
Oh yeah, that's probably because you have a sleeper build.
by dreggsome August 16, 2021
by K February 03, 2005