From Longman Dictionary of Contemporary Englishgoofgoof1 /ɡuːf/ (also goof up) verb [intransitive, transitive] especially American English informalMISTAKE to make a silly mistake Somebody goofed and entered the wrong amount. The restaurant totally goofed up our reservations. → goof around → goof off→ See Verb table
Examples from the Corpus
goof• So the plaintiffs called Fung back on their rebuttal case to tell jurors he had goofed.• Somebody at the company goofed and entered the wrong check amount.• On many other cuts, though, he goofs around in a self- deprecating way that actually seems phony.• Sean Goff goofing around in his pyjamas at the Whiplash 2 comp around 1985.• Best I can tell, we goofed by ignoring the Miata Factor.• I dug the idea of being free enough to just goof off from incessant maths homework.• Guys play basketball, goof off, gamble, hang out, argue and ignore their women.• Whoever goofed, there was no doubt that the engineer was right.goofgoof2 noun [countable] especially American English informal 1 MISTAKE (also goof up) a silly mistake The goof could cost the city $5 million.2 STUPID/NOT SENSIBLE (also goofball) someone who is sillyExamples from the Corpus
goof• He had been made the victim of what was known in the department as a goof.• I just stood there like a goof waiting for him to introduce her.• A nice goof is to hide it altogether by positioning your pointer on its top edge and dragging down.• Most of the rest of us, on the other hand, are paralyzed by our goofs.• Anyway, after a year Matty would be on the other side of the goof.Origin goof2 (1900-2000) Probably from goff “stupid person” ((16-20 centuries)), from French goffe “awkward, stupid” 