(Verb): The Act of doing promiscuous things on Facebook OR The Act of commenting/posting on many peoples walls, pictures, status's, and other things on Facebook.
John:Wow! did you see all the comments Alison left on everyones wall.
A slutdookie is when a woman has a one night stand with someone and before leaving their house she leaves a massive wet shit in your toilet to remember her by
"oh my god, Amanda left a giant slutdookie in my toilet and it totally clogged it up."
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.