The practice of doing a second wrong deed after being caught doing a first wrong deed, with the hope that you'll probably just be punished once.
Larry: Oh man! The Double Transgression Theory! It's like when a dog is sent outside because he pee'd on the rug, so knowing he's already in trouble he takes a hotdog off the table on his way out. Brilliant.
nutsack-related funny business
Tom: Hello, Jake
Jake: Oh... hey, Tom. What's up?
Tom: If I didn't know better, I'd say there's some nutsackery going on in here.