in (one's) heyday

(redirected from in their heyday)
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in (one's) heyday

In, at, or during the period of one's greatest success, power, vigor, etc. In my heyday as a stock broker, I was making millions of dollars each year, but when the economy crashed, I lost nearly everything.
References in periodicals archive ?
Of the nine Sixties acts presented, the one I'd most like to have seen in their heyday was The Animals.
Each generation gravitates to the colors that were hot in their heyday.
Not infrequently, in their heyday, classical liberals found themselves ranged against a practical alliance between the extreme Tories to their one side and the Jacobins on the other.