goof

Noun

• a person who amuses others by ridiculous behavior

• a man who is a stupid incompetent fool

Verb

• commit a faux pas or a fault or make a serious mistake
  • I blundered during the job interview
    

Related words

• Synonyms: 
  clown , buffoon , goofball , merry andrew , fathead , bozo , jackass , goose , cuckoo , twat , zany , drop the ball , sin , blunder , boob