Blunder
WordNet
noun
(1) An embarrassing mistake
verb
(2) Utter impulsively
"He blurted out the secret"
"He blundered his stupid ideas"
(3) Make one's way clumsily or blindly
"He fumbled towards the door"
(4) Commit a faux pas or a fault or make a serious mistake
"I blundered during the job interview"