blunder

Noun

• an embarrassing mistake

Verb

• utter impulsively
  • He blurted out the secret
    
  • He blundered his stupid ideas
    

• make one's way clumsily or blindly
  • He fumbled towards the door
    

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

Related words

• Synonyms: 
  blurt out , blurt , blunder out , ejaculate , fumble , drop the ball , sin , boob , goof