sky dumping 

a somewhat childish although greatly amusing practice of excreting from great height in unusual places.

The Cooker (looking up in tree): "Dude, what the hell are you doing up in that tree with your pants down?"
Pete Dick (dropping a crap into a parked car's sunroof: "sky dumping, dumb ass"

sky dumping by Pete Dick March 5, 2008

Sky dumping 

Inside industry term describing the practice of intentionally outgassing unwanted gaseous waste products into the atmosphere

The oil company was sky dumping methane as a matter of standard procedure.

Sky dumping by Planetkeeper February 6, 2022