flubbed's Usage Examples:

There, with the eyes of the world on her, Aguilera flubbed the words to the National Anthem.

I got the basic information about the new house correct, but really flubbed it on the location.

If you don't see your favorite Taylor Swift song listed here, they have a function to allow you to add the lyrics (not to mention to correct the flubbed lyrics someone else might have entered!).

Synonyms:

mess up, screw up, spoil, louse up, bumble, blow, foul up, ball up, botch up, mishandle, botch, bungle, bobble, bollocks, miscarry, fuck up, muck up, fumble, bollocks up, bodge, go wrong, fluff, muff, bollix, fail, bollix up,

Antonyms:

better, overgarment, natural object, irresponsibility, succeed,