rue the day (that something happened)(redirected from he'll rue the day)
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rue the day (that something happened)
To curse or bitterly regret a point in time (in which something happened or one did something). I swear to you now, you will rue the day you ever crossed me! Men, if their soldiers advance upon us, we must ensure that they will rue the day!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.