Jackpot

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A term of art for a mutation that occurs early in the growth of a culture; jackpots affect the mutation frequency but not the rate
References in periodicals archive ?
THE UPSHOT: There's a better chance of hitting the jackpot with Ernie - and you never lose your stake.
Parilee had one immediate reaction after hitting the jackpot.
With a one in 300,000 chance of hitting the jackpot, punters have snapped up the tickets.