A clumsy person who breaks things
That floppy boy broke the all the crystal glasses
The first guy you ever date, a tortured soul with a floppy haircut who, despite being incredibly sensitive where matters involving his own well-being are concerned, treats you appallingly, never pays attention to a word you say and dumps you by the side of the road.
I just rewatched twilight and I never realised it before, but Edward is such a floppy boy.