Английский словарь американских идиом - bet one's boots

or bet one's bottom dollar or bet one's shirt {v. phr.}, {informal} 1. To bet all you have. * /This horse will win. I would bet my bottom dollar on it./ * /Jim said he would bet his boots that he would pass the examination./ 2. or bet one's life . To feel very sure; have no doubt. * /Was I scared when I saw the bull running at me? You bet your life I was!/