adv; mans up, manning up, manned up.

1.To man up: Its time for you to man up for your baby girl.
2.To be manning up: he manned up once he saw the one.

3.To have manned up: he manned up for his son in the past.
1.Did he man-up, or fess-up to his moma!?
2.Today I might be manning-up, for class.

3.Get up to my level of happiness, before you leave.
by RB. 865 January 21, 2014

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To conduct one's self befitting of a man deserving of a fine piece of trim.
John C and Ralph M watched as a sniveling young punk cry like a school girl while watching his women knob down on another man. John C turned to Ralph M and stated: That mother fucker needs to MAN UP. Derived Mid 1970s NJ.
by questor1 August 06, 2011

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To play man-to-man defense in a basketball game.
Timid Timothy pissed his pants when the coach told him that he'd have to man up against Shaq.
by Nick D May 17, 2004

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When a grown man is crying and moaning about something out of his control and someone tells him to knock it off or "man up"
Also see misspelled entry "manup".
Worker 1: Man, i hate diging ditches. Why do we have to do this all the time? This sucks. I need a break. My feet hurt. The boss hates me.
Worker 2: Quit acting like a little girl and "Man up"!
by Chadster October 24, 2003

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Said when the would be, baller is talking all the shit to get what he/she wants
Another way of being called out after action has been taken.
You want it sucka, it's time to Man up. Request or ask for what you want and see what happens.

or

Guy: Bro I put $20 on the fact J's bullshittin.

Girl: Yeah he won't do it! Says he's a bad ass baller but won't just go for it. Man up dude.
Guy: Nevermind $20. I put a 50 spot on the fact he pussies out and doesn't do it.
by wolfdog8mynutsDrnsqirl November 25, 2009

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a way to send away hexes or to get a faggot to show masculinity
A Rumps...MAN UP.baggaloggadagga dooga dogga logga....HEX BROKE!!!!!!!
by Transworld Surfing for xbox August 15, 2008

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After a long night of high octane™ drinking.... the procces of hanging over occurs. To deposit these prodiougous feelings a beer or some other alcholic beverage is in order, to insure the release of the harmful intoxicating feeling.
After Timmy was drinking with high octane™ all night, he arose out of bed with a raging headache. To release the pain from his body he had a man up session and felt much better.
by GaryF August 09, 2006

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