The phrase may imply stereotypical male traits like toughness and may be seen as reinforcing gender roles. He told me to man up after I showed my concern.
Pro Tip 2/3
Emotional Strength
'Man up' often suggests hiding vulnerability or discomfort rather than openly expressing feelings. I know you're afraid, but you need to man up for the interview.
Pro Tip 3/3
Colloquial Use
It's informal and usually found in casual conversation, not in professional or formal settings. If you want to go out with her, man up and ask her directly.