奇想天外

Meanings

1. Na-adjective, No-adjective, Noun

   fantastic; bizarre; incredible; unbelievableFour-character idiom

2. Noun

   tree tumbo (Welwitschia mirabilis)

• このミステリーのトリックは、奇想天外きそうてんがいだ。

  This mystery has a plot twist that's completely novel.