to blunder; make an error, misjudgment, etc.

to waste or kill time; evade work or responsibility (often fol. by off or around )

Exam week is not a time to goof off. We goofed around till train time.

to spoil or make a mess of (something); botch; bungle (often fol. by up )

You really goofed up the job.

a foolish or stupid person.

a mistake or blunder, esp. one due to carelessness.

a source of fun or cause for amusement

We short-sheeted his bunk just for a goof.

goof on, Slang . to tease, ridicule, or mock; make fun of.

verb

blow it , blunder , botch * , bungle , err , flub * , foul up , get wrong , louse up , make a boner , mess up , miscalculate , mix up , screw up * , slip , snarl , bum , laze , loaf , loiter , lounge , shirk , bobble , faux pas , misdo

noun

ass , idiot , imbecile , jackass , mooncalf , moron , nincompoop , ninny , nitwit , simple , simpleton , softhead , tomfool , bull , bungle , foozle , fumble , muff , stumble

phrasal verb

ball up , blunder , boggle , bungle , foul up , fumble , gum up , mess up , mishandle , mismanage , muddle , muff , spoil