How best to describe the welsh wowser?

‘A person who is obnoxious or annoying to the community or who is in some way disruptive’

to wit, a mealy-mouthed hypocrite, a pious prude, one who condemns or seeks to curtail the pleasures of others or who works to have his or her own rigid morality enforced on all)

A pernickety kind of person, always objecting to everybody else who does not agree with him; he will interfere with the pleasures and enjoyments of others; thinks that he alone has the right conception of right conduct, and a monopoly of the narrow way to paradise....’

The Australian writer C.J. Dennis defined it thus: 'Wowser: an ineffably pious person who mistakes this world for a penitentiary and himself for a warder'.