goofPronunciation: /guːf/ informal, chiefly North AmericanTranslate goof | into Italian Definition of goof noun 1a mistake:one of the most embarrassing goofs of his tenure 2a foolish or stupid person. verb [no object] 1behave in a silly way or playful way:they started goofing around in front of the cameras (goof off) be lazy; avoid one’s work or duties:too many students are goofing off (goof on) make fun of; ridicule:Lew and I started goofing on Alison’s friend 2make a mistake:someone at the bank had goofedOrigin: early 20th century: of unknown origin; compare with goop1goof in other Oxford dictionaries Definition of goof in the US English dictionary