When you do something so monumentally stupid that it's not enough for your partner to make you sleep on the couch: you have to sleep outside on the curb instead.
Man, I really screwed the pooch this time. Guess I'm sleeping on the curb tonight.
When someone is finally resting or accepting a situation, after they've been fighting it. (Based on their use on hospital patients, who may be fighting to pull out IVs or foleys, and so they put "big mittens" on their hands so they can't hurt themselves, and they finally fall asleep.")
"Is your friend still suing their landlord to get their deposit back?" "No, she's decided to let it go. She's sleeping with the big mittens on."