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To do something although it will cause one to suffer because one feels it is correct. Similar to man up but more unpleasant and/or futile.
I'm going to martyr up and invite my family for Thanksgiving.

Is anyone willing to martyr up and organize a holiday party?
by Yarrow November 23, 2009
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Sep 16 Word of the Day
(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.
Last night, hit a good lick. I brought home three figures easy for about two hours worth of my time. Not too bad I don't think.
by Nikki Stixx January 18, 2021
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