parlay

To wager the winnings plus the initial stake of one bet on a subsequent wager, or to engage in a series of such increased wagers.

To exploit success in one endeavor so as to achieve greater success in subsequent endeavors.

Fig., to transform a gain into something of greater value.

The act of betting the winnings from a prior bet, plus the original stake, on a subsequent bet; the second or later such bet in a series; also, a series of such bets, with the stakes for later bets coming from the winnings of earlier bets.