noun
I doubt it (card game); cheat; bluff
A card game where players try to get rid of their cards by declaring ranks, and others can call 'doubt' if they suspect a bluff. Also used for the act of cheating or bluffing in the game.
ダウトは、トランプを使ったパーティーゲームです。
Doubt is a party game played with playing cards.
彼はダウトが得意で、いつも上手にブラフをかける。
He's good at the game of doubt and always bluffs skillfully.
interjection
I doubt that; no way; you're fibbing
Colloquial interjection expressing disbelief or suspicion, similar to 'I doubt it' or 'no way' in English. Often used playfully among friends.
「昨日、有名人に会ったんだ。」「ダウト!本当?」
"I met a celebrity yesterday." "No way! Really?"