Answer: flopping

AnswerCrossword Clue
floppingSit or lie down heavily or suddenly in a specified place, esp. when very tired
floppingFall, move, or hang in a heavy, loose, and ungainly way
flopping(of a performer or show) Be completely unsuccessful; fail totally
floppingRest or sleep in a specified place
floppingFLOP, to drop heavily
floppingInvert (a negative) so that the right and left sides of a photograph are reversed