Meaning of I DOUBT IT in English

I DOUBT IT

 ̷ ̷ˈ ̷ ̷ ̷ ̷ noun

Usage: capitalized first I

: a card game in which each player tries to be first to empty his hand by laying down a number of cards and calling them the rank it is his turn to play (as two, ten, ace), discarding them if no one says “I doubt it” or if his claim is proved correct, but having to take up all discards on the table if it is shown that he included cards not called for

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.