blunder, blooper, bloomer, bungle, pratfall, foul-up, fuckup, flub, botch, boner, boo-boo (verb)

an embarrassing mistake

botch, bodge, bumble, fumble, botch up, muff, blow, flub, screw up, ball up, spoil, muck up, bungle, fluff, bollix, bollix up, bollocks, bollocks up, bobble, mishandle, louse up, foul up, mess up, fuck up (verb)

make a mess of, destroy or ruin

"I botched the dinner and we had to eat out"; "the pianist screwed up the difficult passage in the second movement"

flub (Noun)

a mistake, an error, especially in performance

flub (Verb)

to goof, fumble, or err; especially to execute or perform poorly