Origin of goof

1915–20; apparently variant of obsolete goff dolt < Middle French goffe awkward, stupid

British Dictionary definitions for goof on

goof
/ (ɡuːf) informal /

noun

a foolish error or mistake
a stupid person

verb

to bungle (something); botch
(intr; often foll by about or around) to fool (around); mess (about)
(tr) to dope with drugs
(intr often foll by off) US and Canadian to waste time; idle

Word Origin for goof

C20: probably from (dialect) goff simpleton, from Old French goffe clumsy, from Italian goffo, of obscure origin

Idioms and Phrases with goof on

goof on

Make fun of, mock, as in He was always goofing on his little brother. [Slang; mid-1900s]