The butt is an obsolete English measure of liquid volume equalling two hogsheads, being between by various definitions.
A butt approximately equated to for ale or for wine (also known as a pipe), although the Oxford English Dictionary notes that "these standards were not always precisely adhered to".
The word "buttload" originated from a load of liquid one butt in size, later becoming a more generic slang term meaning "a lot."
The butt is one in a series of English wine cask units, being half of a tun.