To work a second job, usually at night. To make ends meet, Dad had to moonlight on the 3rd shift.
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MOOK - MOOL - MOOM - Moon - MOONAI - MOONLYN - MOOP - MOOR - MOOS - MOOSE
"MOONLIGHT." Abbreviations.com. STANDS4 LLC, 2020. Web. 5 Jul 2020. <https://www.abbreviations.com/MOONLIGHT>.