Butt Buttload

A butt is a real unit of measurement for a cask of wine.

A buttload is about 108 Imperial gallons.

A butt approximately equated to 108 imperial gallons (130 US gallons; 491 litres) for ale or 126 imperial gallons (151 US gallons; 573 litres) for wine (also known as a pipe), although the Oxford English Dictionary notes that "these standards were not always precisely adhered to".