Английский Этимологический словарь - fun

- early 14c. fon "a fool," later "trick, hoax, practical joke," of uncertain origin. Older sense preserved in phrase to make fun of and funny money "counterfeit bills" (1938); sense of "amusement" is 1727. Stigmatized by Johnson as "a low cant word." Funny meaning "strange, odd" is 1806, said to be originally U.S. Southern. The two senses of the word lead to the question funny ha-ha or funny peculiar, which is attested from 1938. Funny farm "mental hospital" is slang from 1963. Funny bone "elbow end of the humerus" is 1840; funnies "newspaper comic strips" is from 1928.