definition of
blunder

[1] #1 blunder n. [blooper, bloomer, bungle, pratfall, foul-up, fuckup, flub, botch, boner, boo-boo] an embarrassing mistake. wn

[2] #2 blunder v. [drop the ball, sin, boob, goof] commit a faux pas or a fault or make a serious mistake; "I blundered during the job interview". wn

[3] #3 blunder v. [fumble] make one's way clumsily or blindly; "He fumbled towards the door". wn

[4] #4 blunder v. [blurt out, blurt, blunder out, ejaculate] utter impulsively; "He blurted out the secret"; "He blundered his stupid ideas". wn