Flop/flɑːp/ Definition 1 of 5Pro Tip 1/2Indicates Exhaustion Use 'flop' to describe someone falling into a position due to tiredness or relief. After the hike, she flopped onto the couch, exhausted. Pro Tip 2/2Physical Movement 'Flop' often implies a lack of control or grace in the way something falls or lies down. The laundry flopped out of the basket onto the floor.