Floppy (adjective)

1. Lacking stiffness or firmness; drooping or flapping.
2. Not able to hold a shape or form.

Origin:

17th century: from flop + -y.

Examples:

1. The puppy"s ears were still floppy and hadn"t stood up yet.
2. He has a floppy sun hat that keeps the sun out of his eyes.
3. The rope was floppy and wouldn't hold a knot.
4. Her hair was dry and floppy after a day at the beach.
5. The flowers were floppy and had lost their shape.