By guess and by gosh American noun phrase
If somebody is doing something by guess and by gosh, he or she has a huge belief in his or her fortune and does the work without any careful examination or plans.
Make sure that we have all the plans updated. I don’t want things to be made by guess and by gosh.
A dedicated employee will never complete her task by guess and by gosh.
To be thankful or grateful for one's good luck usually while avoiding a bad situation
Used to indicate that it is very easy to guess something
A normally unreliable person can still be right about something, even if it is only by accident.
It is used to say that someone is lucky.