blunder

nouns

an embarrassing mistake
bloomer, blooper, blunder, boner, boo-boo, botch, bungle, flub, foul-up, fuckup, pratfall

verbs

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