From Longman Dictionary of Contemporary Englishmake a hash of somethingmake a hash of somethinginformalDO BADLY to do something very badly I made a real hash of my exams. → hash
Examples from the Corpus
make a hash of something• Such variations can make hash of attempts to say anything categorical about how people respond to alcohol.• Her prolonged absence had affected his concentration, and he'd made a hash of the signature of Percy Bysshe Shelley.• She knew she'd made a hash of the whole thing, and she'd let her tongue run away with her.• And then she's made a hash of that an'all. 