ABSTAINER, n. A weak person who yields to the temptation of denying himself a pleasure. A Total Abstainer is one who abstains from everything, but abstention, and especially from inactivity in the affairs of others.
Ambrose Bierce (1842-1914?) American writer and journalist
“Abstainer,” The Cynic’s Word Book (1906)
(Source)
Included in The Devil's Dictionary (1911).