A sexual act of biting a willing or unwilling partners nipple during intercourse. Sneaky starks are very risky and sometimes done out of anger. If participant is kinky, sneaky starks can be done in order to stimulate pleasure.
Sneaky - bite draws blood.
Super sneaky - the nipple is completely bit off. Leaving a nipple-less boob.
Guy 1: I was with this chick last night who only had one nipple! The other was all bloody and was bit off!
Guy 2: She must be kinky, sounds like she got a sneaky stark recently!
A fart that results in you shitting yourself. It feels like it is going to be a normal fart but when you go to release the fart it is not just gaseous but also comes with out with liquid feces. The liquid feces is the sneaky part because it uses the fart as means to make you shit yourself.
I had a sneaky fart today when I was waiting for the bus so i had to run home to change my underwear.
When two people meet up, usually for a sexual encounter, secretly, without anyone knowing but those two people. Typically used by people on the DL in the homosexual community.