Compounds of オタク

• オタク
  (n) (col) geek
  nerd
  enthusiast
  otaku
  (P)
• 脱オタク
  (n) ex-nerd
  one who has given up geeky or nerdy hobbies
  one who has given up stereotypically geeky dress, mannerisms, etc.
• アニメオタク
  (n) anime otaku