Top Definition
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."
#sneaky #ninja style #stealth #sly #skive
by Naevai April 03, 2009
To be on the sly, the active of sly. You can do something on the sly, maybe stealing something funny and legendary, like mine and Jimbo's road bollard. You could also have 'slying it'
"We took that bollard on the sly"
"Tonight we're slying it/on the sly"
"Come on lads, here we go, on the sly on the sly"
#on the sly #sly #fox #dog #on eth sly #sly dog #sly fox #slying it
by Ybot December 09, 2005
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