1. (Video Game Series) The 4 game Playstation exclusive series with the first three (Sly Cooper and the Thievius Raccoonus (2002), Sly Cooper 2: Band of Thieves (2004) and Sly Cooper: Honour among Thieves (2005)) written by Sucker Punch and the most recently Sly Cooper: Thieves in Time (2013) by Sanzaru Games after an 8 year break. It has had mainly positive success with scores above 80 on Metacritic for the first 3 and around 75 for Thieves in Time. It has stealth, action and noir elements in an open world where certain tasks have to be accomplished to complete the story line.

2. (Video Game Character) An anthropomorphic raccoon who is a master thief from a line of master thieves dating back to ancient Egypt. A tall, thin and handsome grey raccoon with black stripes who typically wears a blue shirt with half length sleeves that goes past his waist line, blue flat cap, blue boots, blue and yellow gloves, a leather thigh pocket on his left knee, a small leather backpack and finally, his prized golden tipped cane. He was orphaned after witnessing the death of his parents at 8 years old and there he met his lifelong friends Bentley (A green tortoise) and Murray (A pink hippopotamus) and together became the cooper gang. Currently 29 years old (estimated) and (SPOILERS) stuck in Ancient Egypt alone with no way back after Thieves in Time.
1. Person #1: Man, i'm bored with all these FPS games. Do you know any different games to try out?
Person #2: Try the Sly Cooper series out, much better than all that generic shooting.

2. Person #1: I swear someone just stole my phone, I felt absolutely nothing.
Person #2 (jokingly): Must be Sly Cooper.
by olirulz111 October 17, 2013
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One who is ridiculously smooth and overly attractive. They are very rare and scarce. They know exactly what to say and one. Always. They reel you in and make you want them because they are so nice and approachable. But do they want you? Probably not. Sly moterfuckers only want comparable sly motherfuckers. Sucks for you. Sly motherfuckers are often mixed race but may come in any colour. ***Note: When two sly motherfuckers procreate, the offspring is often flawlessly attractive and unimaginably smooth. In other words, a dirty sly motherfucker.
1: Jeremy is an example of a mixed race, sly motherfuckerrrr.
2: Kyrstin is a white sly motherfucker.
3: Carter is a DIRTY SLY motherfucker. Damn.
by fckh8 December 4, 2010
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a sly cat who is constantly trying to weave in and out of situations. The only thing he is able to do is get by and bring sarcasm to class. He is able to successfully evoke sympathy from fellow students so that they will hand over the homework they worked really hard on.
Sly cat Stephen Rothstein teaches at the Getting By School for children who are unable to complete work on their own.
by Gordon Hodgson December 20, 2007
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To slip a trip or disco biscuit into a person's drink without their knowledge. Done with good intentions. Related to rohypnotized but less rapey.
Our mate didn't want to come out on the town tonight. So we sly fry(ed) him to get him motivated.
by Bluebaggerscott July 12, 2015
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Basically shortened for 'on the sly' basically a way of describing somebody doing what ever slyly or by doing something quite cool.
Popular around the north west of England

*Guy kicks a football*

'ahh look at him kicking that ball ont sly'

*guy sneaks into room'

'Look its joe ont sly'
by KyleMc March 26, 2008
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Sly Dogg: someone who is sly when it comes to the ladys
Svet duric
James Womack(both well know Sly Dogg's)
etc...
by Hell Beers June 28, 2009
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when a scaldy traveller gets a blowjob secretly behind the decks
did you hear tom got a sly blowy last weekend
by scaldy2k9 July 26, 2010
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