πάτημα σταφυλιών → grape-treading, grape-stomping, grape treading, grape stomping, pigeage, wine stomping
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Grape-treading or grape-stomping (also known as pigeage) is part of the method of maceration used in traditional wine-making. Rather than being crushed in a wine press or by another mechanized method, grapes are repeatedly trampled in vats by barefoot participants to release their juices and begin fermentation. Grape-treading was widespread in the history of winemaking, but with the introduction of industrial methods, it now survives mostly as a recreational or competitive activity at cultural festivals.
Grape treading - Wikipedia