I often drive past a large poster advertisement for an Edinburgh "heavy drinking - late night establishment". It says in large letters "big jugs, well hung". I can only assume that it relates to the way that the pitchers (to USn's) are arranged over the bar.
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Well, I suspect that it depends on whether your definition of 'jugs' is kept in the cupboard or the gutter. Likewise as to whether it is a 'who' or a 'what' that is well hung....