When you're fucking a bitch missionary and you're squeezing her tits hard for an advantage point, and right before you cum you barbaricly tear her breast implants out cum in the two new holes you have just made and replace them with the last girl's you did it to.
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?"