When one person pulls down the trousers of another, leaving them dressed from the waist up, like Donald Duck.
She was in the kitchen and I totally donald ducked her from behind.
English rhyming slang for "fucked"
"If we can't somehow catch up on these overdue mortgage payments we'll be(Donald Ducked)."
"He's(Donald Ducked)......his girlfriend's sister has just seen him kissing that chick at the Pub."