A phrase used by Antiguan males to warn people that they are not one to be played with or taken lightly.
Example

John Doe 1: * bumps into Dario at a party* and does not apologize.

Dario: Barse, you just bumped into me and didn't say sorry. A wan fuck up man me be na boss.

John Doe: * shivers* I am sorry sir. *retreats*

Confrontation Averted
by CherylBigSon March 22, 2020
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The expression "Yo-Dudes" uses to scare 13-years-old "Yo-Dudes".
by Delf June 23, 2003
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Your tellin ya boy not to mess like with the ladies or on a job interview
"Yo Man Don't Fuck Up that girl is fine"
by : P ya right May 3, 2006
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oH oH ScArY Oh ShIveR Me TimBerS Sh)t Up Man is when someone threatens you but there skinny af
oH oH ScArY Oh ShIveR Me TimBerS Sh)t Up Man
by InterestingMeanings November 17, 2021
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P1: Hey, why are you acting all emotional and sad

P2: I got my employee review. My evaluation says I got an attitude problem, which cost me annual raise

P1: But they gave you feedback about how to fix that right?

P2: yeah!

P1: Well, then MAN UP! Master this accentuated (highlighted) negative you received under pressure! They just told you how to get your money up! So go get your money up!

P2: True! Thanks for flipping that around; instead of pouting, I'm planning!
by Liqr1 August 14, 2021
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When some boy or a man act very feminized and has behavior that is more appropriate for the female gender like gesturing or liking some things that it is not usually for guys to like ( such as makeup, fashion, etc.).When that boy or a man decided to change and to start acting and liking things that guys usually like(such as football ,beer etc) we could say that he Man up himself
John: Remember my neighbor Jack?
Joseph: Of course,that guy who everyone thinks is gay because of his effeminacy?
John,Yeah that guy,he actually Man up himself,he started to gym,he got muscles and he started to go on football matches
Joseph: Wow,he really man up himself
by Kaivosguy11 April 10, 2020
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to gain the perspective of an adult (usually male) in order to achieve a goal.
If he wants to get a job, he should put down the crayons and man up.
by jameson556 November 18, 2018
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