wowser

noun1

1. •
   (Australia, disapproving) One with strong moral views against alcohol, gambling, pornography, etc., who seeks to promulgate those views; a censorious, self-righteous, puritanical person who tries to stop others from having fun.

   • When they have paid attention to temperance advocates they have tended to dismiss them as ‘wowsers’ or ‘puritans’ intent on suppressing pleasure. — 1999