What does ユーザー mean?
ユーザー is a Japanese noun meaning “user” in English. It is written as ユーザー in hiragana, and yuuzaa in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
純粋に、ミクシィユーザーが言うところの「変な人」ってどんな人なのか、私にはいまいちわからないのだ。
It's simply that I don't really understand what an "oddball" is when said by a Mixi user.