Noun

• S: (n) blunder, blooper, bloomer, bungle, pratfall, foul-up, fuckup, flub, botch, boner, boo-boo (an embarrassing mistake)

Verb

• S: (v) drop the ball, sin, blunder, boob, goof (commit a faux pas or a fault or make a serious mistake) "I blundered during the job interview"
• S: (v) fumble, blunder (make one's way clumsily or blindly) "He fumbled towards the door"
• S: (v) blurt out, blurt, blunder out, blunder, ejaculate (utter impulsively) "He blurted out the secret"; "He blundered his stupid ideas"