When you unscrew someone's showerhead and fill the inside with feces. That way the next time they take a
shower they
will literally be covered in shit. Similar to the Upper Decker, the SkyBox is a step above.
A-"That asshole forgot to lock his
door so I left him a present."
B-"What'd you do, give him an Upper Decker?"
A-"
Nah, this dick deserved more, so I SkyBoxed him."
B-"You sick
bastard!"