What is the meaning of Potale?

A liquid byproduct from a grain distillery, consisting of the liquid portion of draff after the spent grain is removed, plus washings from tuns (spent wash). Over time its disposition has varied: mostly as dumped waste, sometimes sold for part of the ration for pigs and cattle, when such a market is available.

second-person singular voseo imperative of potar combined with le

Source: wiktionary.org