A person who goes places and does things they are not supposed to do without being detected.
Josh is such a Sneak, you know he went in the Robinson's backyard and stole their sons bike.
by Ace trick March 31, 2011
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moving around quietly and sneakily. usually done in the dark by slick ninja-types.

the act of being sneaky and sneaking around like a snake. a very slippery criminal. a smooth-talker talking smooth like a slippery devil. a very bad person. a person with no morals and who lacks the values of a good christian boy. a very bad boy. ive been very bad. sorry mommy!!!

... what was it that i was defining?
The slick ninja snuckt into the window like a very bad and slippery sea weasel who slupt into the sea. its hard to use in a sentence...you know... sneaking!
by barnabus July 13, 2006
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Sneaking is to make a list, and include something that probably shouldn't be there, and is only there due to the creator's bias
"Top 3 Best US States: 1. Texas, 2. California, 3. Nebraska."
"Bro tried to sneak in Nebraska"
by SPCOOKI# October 1, 2023
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the art of being sneaky and secretive
We were very sneakative when we took and drank the wine during the Madrigal dinner.
by sneakativeman November 15, 2010
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the past tense of sneak, I'm a grammar scholar and it's not snuck.
I sneaked into her house at night.
by Mary Jane Lee June 15, 2022
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