by guess or by golly
By any means; without careful planning; relying on guesswork and luck. We don't have much to work with, but by guess or by golly, we're going to figure out a way to save our business! He just throws his essays together by guess or by golly, but he still manages to get good grades on them. Have you given any thought to your future, or do you intend to live your life by guess or by golly, hoping for the best?
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