To hold a blunt or joint for longer than the typically allotted time. This is usually a result from being really high and not realizing that you should have passed the blunt a while ago.
"Dude you're parking it. How long are you going to sit there with that thing?"
"You've been parking it for a while. It's almost burned down"
When you arrive at a public event, (movie, piano recital, PTA meeting, etc.) and can’t bare to make it through sober, so you full send hard liquor in the parking lot after you arrive to get a nice drunk on.