blunder blunder /ˈblʌndɝ/

noun

1. () An embarrassing mistake  ( bloomer [Informal] , blooper [Informal, N. American] , boner [Informal, N. American] , boo-boo [Informal] , botch , bungle , flub [Informal, N. American] , foul-up , fuckup [Vulgar] , blunder , pratfall [Informal] )
   an embarrassing mistake
   

verb

1. () Commit a faux pas or a fault or make a serious mistake  ( boob [Informal] , drop the ball , sin , blunder , goof [Informal] )
   commit a faux pas or a fault or make a serious mistake
    I blundered during the job interview
   I blundered during the job interview
   
2. Utter impulsively  ( blunder , blunder out , blurt out , blurt , ejaculate )
   utter impulsively
    He blurted out the secret
   He blurted out the secret
    He blundered his stupid ideas
   He blundered his stupid ideas
   
3. Make one's way clumsily or blindly  ( blunder , fumble )
   make one's way clumsily or blindly
    He fumbled towards the door
   He fumbled towards the door