When you are fingering a girl, and a rogue finger accidentally hooks into the anus. Although this incident is generally accidental, it is possible to fake it for personal gain. Occationally said girl won't even notice, if you correct yourself quickly enough.
"Man, me and Alice were going at it the other night, and I accidentally pulled the old 'Swirl'n Sneak'. She didn't even notice!"
by Luke Stevens July 18, 2007

by jason evans August 20, 2003

To dance sexually behind an unsuspecting passerby or member of a crowd without getting noticed. First popularized by international visitors in Osaka Japan.
by heyhoballyhoo April 28, 2014

When one two males are urinating in a bathroom, and one guy surreptitiously looks over at the other guy's junk to get a "sneak peek" at his jewels
"Bro, I was peeing, and Rodney took a sneak pee at me!"
"Dude Josh totally just sneak peed me in the bathroom. Wtf!?"
"Dude Josh totally just sneak peed me in the bathroom. Wtf!?"
by NitchBigger August 4, 2016

Something that’s made up by someone for the sole purpose of making people perceive it as real for a few years and people attempting to find it or think about it, with it working.
1. “I should’ve known his ludicrous statement about his fight with a tiger was a cookie sneak.”
2. “This lost film seems like one giant cookie sneak.”
2. “This lost film seems like one giant cookie sneak.”
by Godlys July 21, 2023

by g0biin October 12, 2010

When someone is being real sly secretive you know like Mr mystery man sneaking around you just being real sneaky like your body actions and mannerisms.
man you didn't even see that dude he was all Sam sneaks up on us didn't hear or see anything like a ghost.
by BOBBO BOLANSKI May 1, 2022
