SINCE 1828
man up
verb
manned up;
manning up;
mans up
Definition of man up
informal
: to make an effort to deal with something (such as an obligation or a challenge) in a way that is considered strong or manly
"… You're starting a family. Man up. Time to do grown man things."— Cassanova Womack … man up and be honest that what you did that night was wrong.— Lenny Rosado
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Merriam-Webster unabridged
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