The act of tucking a male's junk (aka twig 'n berries) down, up, and under with the ultimate goal of completely hiding saidjunk from any discernible bulge in the frontal region of his swimsuit area.
Deeeeeeeaaaaaaam! Look at that guy over there by the lazy river pool! You literally can't see any wein-bulge at all. He must have lampoosed.
When a man openly states "i have to take a shit" and the walks into the nearest grocery store and bends over the urinal and takes a shit and then the man kicks the flush bar watches his lampoose and says victory. then goes to the nearest extraordinaraly small midget and says "small guy check this lampoose out" make hand gestures to the urinal.
Man: that was a glorious lampoose.
Extraordinaraly smallmidget: that was a boss lampoose brah.
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?"