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  1. X - Kiss
  2. X TREME - extreme
  3. X) - Happy, mischevious
  4. X-I-10 - Exciting
  5. X.X - Exasperated, irritated, annoyed
  6. X3 - Cute face
  7. XAXA - Ha Ha
  8. XB - XBox
  9. XB36T - Xbox 360
  10. XBF - Ex-Boyfriend
  11. XBL - XBox Live
  12. XC - Cross Counrty
  13. XCEPT - except
  14. XCPT - except
  15. XD - extreme droll
  16. XDD - Laughing especially hard
  17. XELLENT - excellent
  18. XEP - Except
  19. XFER - transfer
  20. XGA - eXtended Graphics Array/Adaptor
  21. XGF - exgirlfriend
  22. XHTML - Extensible Hyper-Text Markup Language
  23. XING - crossing
  24. XIT - Exit
  25. XITB4ILI - Exit before I lose it
  26. XL - Extra Large
  27. XLNT - Excellent
  28. XLR8 - Accelerate
  29. XLS - MS Excel file extension
  30. XM - Extreme
  31. XMAS - christmas
  32. XME - Excuse Me
  33. XML - eXtensible Markup Language
  34. XMPL - example
  35. XO - Hugs & Kisses
  36. XOAC - Christ on a crutch
  37. XOR - hacker
  38. XOVER - crossover
  39. XOX - Hugs & Kisses
  40. XOXO - Hugs & Kisses
  41. XOXOXO - Hugs and Kisses
  42. XP - experience
  43. XPECT - expect
  44. XPLANED - explained
  45. XPT - except
  46. XQZT - Exquisite
  47. XROADS - crossroads
  48. XS - excess
  49. XT - Cross Training
  50. XTC - Ecstasy
  51. XTRA - extra
  52. XTREME - extreme
  53. XVID - Video format
  54. XX - Kisses
  55. XXX - 30
  56. XXXX - Not Defined
  57. XYL - Ex-young lady
  58. XYZ - eXamine Your Zipper
  59. XYZPDQ - Examine Your Zipper Pretty Darn Quick
  60. X] - Happy
  61. X_X - Dead
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