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1. An embarrassing mistake
   - blooper [N. Amer], bloomer, bungle, pratfall, foul-up, flub [N. Amer], botch, boner, boo-boo, blue [Austral, NZ]

1. Commit a faux pas or a fault or make a serious mistake
   "I blundered during the job interview";
   - drop the ball, sin, boob, goof
    
2. Make one's way clumsily or blindly
   "He blundered towards the door";
   - fumble
    
3. Utter impulsively
   "He blundered his stupid ideas";
   - blurt out, blurt, blunder out, ejaculate

Derived forms: blundering, blundered, blunders

Type of: breach, break, error, fault, go across, go against, go through, infract, mistake, mouth, offend, pass, speak, talk, transgress, utter, verbalise [Brit], verbalize, violate

Encyclopedia: Blunder