Nouns

Verbs

(v)drop the ball, sin, blunder, boob, goofcommit a faux pas or a fault or make a serious mistake“I blundered during the job interview”
(v)fumble, blundermake one's way clumsily or blindly“He fumbled towards the door”
(v)blurt out, blurt, blunder out, blunder, ejaculateutter impulsively“He blurted out the secret”, “He blundered his stupid ideas”