by guess and by God

by guess and by God

By any means; without careful planning; relying on guesswork and luck. We don't have much to work with, but by guess or by God, we're going to figure out a way to save our business! He just throws his essays together by guess or by God, but he still manages to get good grades on them.
See also: and, by, god, guess

by guess and by God

without specific guidance or direction.
This expression was originally used in a nautical context, where it meant to steer blind, without the guidance of landmarks. The alternative by guess and by Godfrey is also sometimes found.
See also: and, by, god, guess