used to say that it is easier and wiser to stay in a bad situation that you know and can deal with rather than change to a new situation which may be much worse
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used to say that it is easier and wiser to stay in a bad situation that you know and can deal with rather than change to a new situation which may be much worse
Better the devil you know than the one you don't.
Definitions from the Oxford Advanced Learner's Dictionary, 9th edition