There are surley many more uses for a frisbee, but 48 isn't a bad list:

1. Ultimate
2. Disc Golf
3. Make it into a clock
4. pot lid
5. Fire fanner
6. plates/platter
7. snowshoes,
8. hat
9. alternative to fig leaf
10. halo
11. dog dish
12. sled
13. bookmark
14. hubcap
15. shower caddy
16. litterbox
17. gold prospecting pan
18. small shield
19. rainshield
20. manhole cover
21. PA pothole cover
22. play prop (as a ufo)
23. ashtray
24. in the absence of coconuts, a horse
25. English-plastic dictionary
26. beer glass
27. snowshovel
28. doorstop
29. fan on a hot summer day
30. cereal bowl
31. breakfast in bed serving tray
32. temporary iceskates
33. weapon
34. in place of a woodenspoon, yardstick, or belt for spankings
35. berry collector for berry picking
36. tray for important stuff on the nightstand or dresser
37. rain collector when stranded on a deserted island
38. target practice
39. excellent for creek exploring
40. drum for impromptu jam sessions
41. measuring cup
42. ugly dorm wall brightener :-)
43. Jell-o mold (use Jiggler recipe)
44. collecting basin
45. wind break for firebuilding
46. cutting board
47. platform for backpacking stove to protect from snow/ wet ground
48. Signal device (one PFF disc with a reflective X = get noticed!)