Bet one's bottom dollar on.

　　Put all one's eggs in one basket.

　　Win the horse or lose the saddle.

　　eg：Robert bets his bottom dollar on the horse he is sure to win.

　　中英俚语俗语来源：元史·伯颜传："今日我宋天下，犹赌博孤注，输赢在此一 掷耳。 "

　　同义词：竭尽全力 Shoot one's bolt.

　　反义词：留有一手 Have a second string to one's bow.