On the sly

To do something on the sly is doing something sneakily, like a ninja.

"Check it out, I stole this on the sly."
"I'm skiving off school, on the sly of course."

by Naevai April 3, 2009

The Sly SHow

"The Sly Show" is the most irreverent, unpredictable, and insane talk show - ever. Sly is the Hip Hop Howard Stern; dropping bombs like Funkmaster Flex and calling everybody (and their mama) out like Wendy Williams on a bad day. Add a little Andy Milonakis-style hilarity, mix in Sly's unmistakable voice; and you get the loud-mouthed, prank-callin', dozens-playing obnoxious shock jock of the century - SLY.

The Sly Show: "The greatest show in the face of the fuckin earth!"

by MiamiBizzle February 14, 2007

Jon Sly

To look at someones Crutch when nobody is watching and being caught.

You have been Jon Slyed Stalking that lady.....

by HairShum June 11, 2006

ont sly

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

the sly amy

When your wife convinces you she isnt cheating but you find out she's been cheating with EVERYONE.

Ugh I found out everyone at the Christmas party slept with Amy even though she said they didn't. I got the sly Amy.

by Thelargestlarge May 5, 2016

macking on the sly

Covert flirting between two people. Because they have to keep their true feelings for each other secret, for whatever reason (i.e. they work together, one is married, etc.).

"Those two can't seem to stand each other! They're always fighting over something!"

"Wrong, man. It's all a front they put up. They're actually macking on the sly."

by D. Gould March 8, 2006

On Sly

Shorter, easier way of saying
'on the sly' meaning 'in secret' or 'not obviously'.

Usually pronounced like 'ont sly' by people from the north of england.

Chloe: aww look at you, you're well excited on sly!
Amy: I so am not!!

by cocacolaprincess21 August 8, 2007