Liffey water en · NOUN
Etymology
From the name of the Irish river. Possibly also rhyming slang for porter (“kind of beer”).
Meanings
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(slang, uncountable) Guinness (brand of dark stout beer)
Good value over a pint of Liffey-water, but so what?
1996, Theatre Record, volume 16, numbers 9-15, page 40:It serves a decent pint of Liffey water, as well as beaming in football from the British Isles.
2011, Time Out Rome, page 218: