BOLLIX

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”

Source: WordNet® 3.1

Etymology

Verb

bollix (third-person singular simple present bollixes, present participle bollixing, simple past and past participle bollixed)

(transitive) To confuse.

(transitive) To botch or bungle.

Noun

bollix

confusion

mess

Source: Wiktionary