floppy

/ˈflɑpi/
adjective
  1. Hanging or bending loosely; not stiff or firm.
    • The puppy's ears were so floppy they flopped over its eyes.
    • The old mattress was too floppy to provide any support.
    • I prefer a floppy hat that I can fold up and put in my bag.
Antonyms
noun
  1. Short for floppy disk; a flexible magnetic disk used for storing computer data.
    • The computer still has a drive that reads floppies.
    • I found an old floppy in the attic with my school projects on it.
    • We used to save our homework on a floppy and hand it to the teacher.