トンデモ

noun, used as a prefix, noun

unthinkable; outrageous; absurd

Colloquial abbreviation of とんでもない, used as a prefix or noun to express that something is shockingly bad, unexpected, or beyond belief. Often attached to nouns (e.g., トンデモ発言, トンデモ理論).

See also: とんでもない

• 彼かれのトンデモ発はつ言げんにみんな驚おどろいた。

  Everyone was surprised by his outrageous remark.

• あの映えい画がはトンデモ設せっ定ていで笑わらえる。

  That movie is funny with its absurd premise.