blunder

(noun) an embarrassing mistake. Synonyms: blooper, bloomer, bungle, pratfall, foul-up, fuckup, flub, botch, boner, boo-boo.

(verb) commit a faux pas or a fault or make a serious mistake. Synonyms: drop the ball, sin, boob, goof. Example: "I blundered during the job interview."

(verb) make one's way clumsily or blindly. Synonyms: fumble. Example: "He fumbled towards the door."

(verb) utter impulsively. Synonyms: blurt out, blurt, blunder out, ejaculate. Examples: "He blurted out the secret." "He blundered his stupid ideas."