Found in my drafts
  1. K8
    Obviously
  2. K9
    Yay pups
  3. KY
    Excellent (Y is a number it's a variable and an axis and maybe an intercept whatever I remember math stuff okay)
  4. K-4
    Elementary bbs
  5. K2
    A mountain more dangerous than Everest (same) h/t @edge
  6. K7
    Something French
  7. K1
    This is military related but I forget