To purposely lie face down with hands and
feet together. Usually done in a weird location such as on stairs, vending machines, or cars. The
point of this
act is to photograph it and place it on FaceBook where it will be marveled at and or laughed at.
Planker: Yesterday I Planked Mr.
Booker's
desk when he was turned around.
Friend: What?? Did you get a
pic and put it on FaceBook?
Planker: Bro, of course i did!!