for better or for worse
Under good or bad circumstances, with good or bad effect. For example, For better or for worse he trusts everyone. This term became widely familiar because it appears in the marriage service of the Book of Common Prayer (1549): “With this ring I thee wed, for richer or poorer, in sickness and in health, for better or worse, til death do us part.” [Late 1300s]
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The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
Examples from the Web for for better or for worse
Historical Examples
We husbands, we lads of the for-better-or-for-worse brigade, we learn to pierce the mask.
Indiscretions of ArchieP. G. Wodehouse