Sleep U 

A 20 defense pure on a MMO game called RuneScape. He can't tank for longer then 30 seconds and loves the show EastEnders. He is also in love with someone by the name of PvP.

Dude don't keep flirting with him, you'll become a Sleep U.

Sleep U by ATyrant August 6, 2009

u sleep 

a shortened version of are you a sleep that people use when wanting to know what you are doing. most often used by athletes when they want to know what their girls are doing.

yeah he wanted to know what i was doing last night and texted me u sleep

u sleep by go home mountainqueers February 4, 2010

Sleep Unit 

A term used to describe the amount of time between when a person wakes up and when they go to sleep. It it useful when pulling all-nighters, or if your schedule is shifted and you are frequently awake late at night. It is more accurate to use this term if you frequently get your days mixed up, as it is often confusing to describe your "morning" or your "night" when you have witnessed many of them in a single sleep unit.

I haven't slept in 36 hours! I've written an 8-page paper, eaten 2 breakfasts, 2 lunches, and seen a movie, all in the same sleep unit!

Sleep Unit by driver0612 January 5, 2011

sleep up 

(Verb) To get all the rest one needs. Implies sleeping late rather than going to bed early.

"I'll let you sleep up in the morning; I know you have a long drive ahead of you."

sleep up by Marbit January 31, 2009

sleep using 

sleep using: taking drugs while asleep. Somnambul-using.

Since being prescribed Ambien, I have driven my car while asleep, made a snack while asleep and had a few episodes of sleep using. Once I even tried to snort some Xanax in my sleep.

sleep using by polljo October 12, 2009

sleep up 

To have sex with a man or woman of a higher caliber, class, or financial status, than the last one you had.

Stop dealing with low class men/women.

"Girls, stop going after these broke-ass dudes. You need to sleep up".
"How many times do I have to tell you? Sleep up"!

sleep up by uaintBoo August 25, 2014

sleep under

when you are sleeping over but find your self having sex with some member of the household.

i did a sleep over at Stephanies.....but when i saw her brother i knew i would be having my own sleep under...damn..i was lucky she was asleep or she would have(box locked) me..

sleep under by MADELINEB January 27, 2008