1)To not behave like a child and to not behave like a woman.
2)To know what masculinity is and what testosterone does.
3)To be an adult male in the truest sense of his manhood.
1)Dude is a MOMMAS BOY, dude needs to man up.
2)Dude is on estrogen, dude doesnt know how to man up.
3)Dude does not mess around, you better man up.
von Brian E.Nightingale 13. Oktober 2007
To become tougher, or more manly.
"Damn nigga, yo ass need to man up!"
"I think it's time for someone to man up!"
"We love to get drunk, go the bar, and find the toughest son of a bitch in there and see how tough he really is...see if he can MAN UP!"
von TST 11. November 2006
Become more brave
What? You need to man up. Do some push ups and man up, dog.
von iwill 18. Dezember 2002
getting ready to go fight or do something daring, preparing for a tough siutaion most times a fight
Ayo we gotta box them dudes tonight
Everyone man up we gotta rumble tonight
von Chris 16. Mai 2004
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