muff diving adjective 1noun 1 adjective1 •(slang, vulgar) Performing cunnilingus; that performs cunnilingus.Profanity, vile name calling, including "muff diving fink" and manners ordinarily frowned upon […] — 1944 noun1 •(slang, vulgar) Cunnilingus.The Archaeology of Muff Diving. — 1991
