n. Another name for penis or cock. It is a term more often used to suggest the penis as a flute, irish tin whistle, or kazoo. It can also be refered to as a game, sexual in nature.
"What did I tell you about being a penis whistle?"
"Hey baby, lets get drunk later and play penis whistle..."
"I'm gonna make you play 'Oh Danny Boy' on my penis whistle if you don't shut up!"
A Mississippi Penis Whistle involves a person blowing air through a "Prince Albert" piercing with no stud jewelry in it, producing a whistle-type noise.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"