Oxymorons

I'm sure I'm missing some good ones. Suggestions please?
  1. 1.
    Spare change
  2. 2.
    Hamburger
  3. 3.
    Bittersweet
  4. 4.
    Awfully nice
  5. 5.
    Jumbo shrimp
  6. 6.
    Living dead
  7. 7.
    Virtual reality
  8. 8.
    Uninvited guest
  9. 9.
    Pretty ugly
    Suggested by   @eatthelove
  10. 10.
    Random order
    Suggested by   @eatthelove
  11. 11.
    Open secret
    Suggested by   @eatthelove
  12. 12.
    Original copy
    Suggested by   @eatthelove
  13. 13.
    Homeland Security
    Suggested by   @johnnyartpants
  14. 14.
    Stand fast
    Suggested by   @seantimberlake
  15. 15.
    Stand down
    Suggested by   @seantimberlake