When you're in big trouble; when you're out of options and there doesn't seem to be a solution; When you're in trouble with parents or other authorities
In marine biology: a male fish that disguises its appearance as a female to sneak into other males nests to fertilize eggs.
In human biology: That somewhat effeminate guy who is "just a friend" of your girlfriend, but will take a stab at her if you get in an argument or are travelling.
Guy: That Aaron guy drives me nuts - do we have to hang out with him?
Girl: Oh, Aaron? He's just a friend! Don't worry!
Aaron (in background, to self): "I'm gonna pound your girls ass the first chance I get!" Aloud: "Oh girl, do you want to go shoe shopping?! I heard there's a sale on and afterward we can chat over coffee!"
Guy (to self): Damn sneaker male!
When young girls text eachother plans at 12 in the morning for 12 at night. Sliding glass doors, Windows, Screens and doors slide quietly open as the girls; cell phones on silent, flip flops in hand, quietly tip toe out of their house. Once outside a simple 'im out' or 'where are you' is received from fellow sneakers and they are good to go!
"Wanna Sneak out tonight."
"Sure i hear theirs a party in the cuts"
"Ok ill call you when im sneaking out and we can go together'
"Cool ill go take off my screen right now"
"See you tonight!"
A combining of the words "secrecy" and "sneak". A way of moving in which you make less noise to avoid being caught, usually entailing creeping around very slowly.