like blazes
From Longman Dictionary of Contemporary Englishlike blazeslike blazesold-fashioned spokenLOT/VERY MUCH as fast, as much, or as strongly as possible We had to run like blazes. → blazeExamples from the Corpuslike blazes• You could lean into the wind and it was raining like blazes.• We're going to have to work like blazes to win this time!