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
彼のトンデモ発言にみんな驚いた。
Everyone was surprised by his outrageous remark.
あの映画はトンデモ設定で笑える。
That movie is funny with its absurd premise.
He started spouting some absurd theory on TV.
あの主張はトンデモだと思う。
I think that claim is completely outrageous.
outrageous book; absurd book; sensationalist book
Common katakana spelling for this colloquial prefix/noun.
Hiragana spelling, also used.
Colloquial abbreviation of とんでもない.