The action of inserting one's hand into another person's armpit and rapidly wiggling as a salmon would wiggle it's tail when swimming. Simultaneously shout 'sneaky salmon' to notify the one who is being sneaky salmoned.
Dude I just sneaky salmoned the shit out of that girl's armpit.
When a guy is giving it to a girl from behind and he is at the point of ejaculation and tells the girl he is cumming only to spit on her back and cum in her face when she turns around thinking he is finished
I was nailing my girl doggystyle when i decided i would play a lil trick on her by doing the old sneaky casserole move. When she turned around and got the surpise load i dont know if the look on her face was anger or delight
1) A term generally used in first person shooters (FPS) games for a team who is secretly takes advantage or gets the upper hand by ambushing the other team.
2) Devious and secretive about your intentions or motives: relating to or from the point of view of person trying to avoid attention.
3) Out of the ordinary to go somewhere secretly, or to take someone or something somewhere secretly.
Following someone into a bathroom, preferably into the actual stall, while at the same time taking your penis out. The idea is to catch the person unawares so that when he/she turns to sit down, your junk is in their face. An erection and/or wanking are optional moves.
That dude totally pulled a sneaky petrash last night at the ceremony and almost made her shit her pants.