エアプ

noun

pretending to be experienced; acting knowledgeable

Internet slang for someone who talks as if they have firsthand experience or deep knowledge about something (e.g., a game, hobby, or topic) but actually doesn't. Often used critically or jokingly. Derived from エアプレイ(ヤー) (air player).

• あの人ひとの解かい説せつ、完かん全ぜんにエアプだよね。

  That person's explanation is totally just pretending to know, isn't it?

• エアプがバレないように、実じっ際さいにプレイした人ひとの話はなしを聞きいておいた。

  To avoid being exposed as a fake, I listened to stories from people who actually played it.