Synonyms : bloomer, blooper, blunder, boner, boo-boo, botch, flub, foul-up, fuckup, pratfall

Example : I botched the dinner and we had to eat out.
The pianist screwed up the difficult passage in the second movement.

Synonyms : ball up, blow, bobble, bodge, bollix, bollix up, bollocks, bollocks up, botch, botch up, bumble, flub, fluff, foul up, fuck up, fumble, louse up, mess up, mishandle, muck up, muff, screw up, spoil

Example : I bungled it!.