Crummaging: (corruption of the word scrummaging) The act of searching for and then stealing the minuscule crumbs covered in flavor from the bottom of another's chip packet.
I was eating my Doritos the other day and then Mitch lent over and started crummaging. What a dick.
The act or act thereof of homeless men/women having an orgy inside of your vehicle.
You parked in a bad area, when you got back to your car a few hobo's half dressed run away from it. Inside you find condoms, mouthwash and semen everywhere. They have been scrumming inside your vehicle. FFS!