What is "fifths"

Usage examples of "fifths".

It's twenty fifths a night for me, and for this band it's seven fifths ha'pint extra.

It was a faded black-and-white photograph of a nude woman, a shabby example of the sort of relic that, bigger and more explicit and in color, could sell for cases of fifths in the fancy galleries in the city.

When she came back two days later, she had a full carton of deep amethyst crystals in fifths and thirds.

Clodine held up the heaviest of the fifths, adjusting her eyesight to scrutinize the crystal.

I found thirteen unbroken bottles, twelve fifths and a quart of bourbon.

I remember thinking that was two fifths each and the quart I would keep in reserve.