noun tap water. Formed from 'pop' (a soft drink) and the 'corporation' that supplied water to domestic consumers; used in northern England UK: ENGLAND, 1997
corporation pop
Tap water that is provided by the local city government (or corporation), likened humorously to a soft drink (pop) that is free. Primarily heard in UK. Back when I was a kid, the only thing we had to drink was corporation pop!