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sleeper

A radical, who hides his or her beliefs in order to prevent suspicion from any authority figure; an extreme liberal who pretends to be a conservative, usually for gaining money to fund a revolution.
James Cole believed a schizophrenic person was going to release the virus; it turned out a sleeper did the job.
by Vash Westland August 24, 2003
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back-sleeper

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.
Matt is a back-sleeper and I'm a tummy sleeper!
by USAF Cadet September 2, 2021
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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.
by bigdust13 January 13, 2010
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sock sleeper

Someone who is unamerican and decides to be stupid and sleep with socks on at night
My friend is a sock sleeper so I think she is weird
by Sophia is a sock sleeper January 20, 2018
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SleeperCell

Suffolk based band best known for their performances on Channel 4's Orange Unsigned Acts. Known for their pop-punk sound and great sense of humour, the boys were well loved despite lack of support by the show's judges.
Original line up saw Barnaby Courtney (lead Vox), Kyle Orton (Guitar &Vox), Patrick Richardson - Todd (Lead Guitar), Rob Banthorp (Percussion) and Matt Fowkes (Bass) wow audiences up and down the country with their catchy riffs, great harmonies and synchronised jumping!

On the show, only Barnaby and Kyle seemed to be allowed to open their mouths (Which most people found appalling due to the humour seen from the rest of the boys in their video diaries) and some obvious editing put them at each others throats, while the rest of the boys were just shown to look "worried".

After the show, the pressure became too much for lead singer barnaby and he left the band in the lurch just when us fans needed him the most. Thousands of young girls were devastated, although this did leave room for Pat & Rob fans to take the lead.
The band carried on for another year, playing a range of gigs up and down the country to receptive audiences and new fans.

As far as i know all members of the band are in a relationship but when that changes Patrick is mine!
"Did you see sleepercell play at the strawberry fair? I did, it was awesome!"
by totalposer January 21, 2010
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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.
by dreggsome August 16, 2021
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sleeper

When you know and feel you will have to take a huge and possiblly painful shit later in the day.
"Dude, this sucks man, I've got a sleeper."
by Cascone September 25, 2008
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