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A man who acts like a baby. If he doesn't get his way, he becomes crabby and unable to work with. thinks he's always right. Can be angered and upset by anything.

Must proceed with caution!

If you come into contact with a Manbaby, back away quickly and run like hell.

Manbaby's are good at concealing themselves amongst society. They seem normal at first but throw fits not long after dating them. Be wary.
Julie: He was bitching about not going to the party because I said I didn't want him to go.

Sarah: He needs to stop being such a manbaby.
by TizzleCizzle April 07, 2010
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2
A man in constant need of nurturing and attention. The manbaby thinks his problems are fascinating and far more important and tragic than anyone else's. He cannot handle rejection in any form and will lament every breakup he has had throughout his lifetime, and cry over how he was mistreated by women decades in the past.
Susan: Why is Peter crying?

Elaine: He was just telling us about a girl he took out once in 1987 who didn't like him that much.

Susan: OMG!!! What a fecking manbaby!
by P.J. Findley July 26, 2011
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3
A guy who tries so desperately hard to be a "man," that he ends up internalizing all of his "unmanly" emotions. The end result is a flailing shitshow the second he realizes he's actually a vulnerable human being.
My man-baby of an ex called me for emotional support at 3 am last night after our break up, even though he broke up with me.
by Whimsyandwine March 29, 2010
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4
An immature, vindictive, narcissistic, brat of a man who has never grown up.
Donald Trump is the poster child for the label man-baby.
by intangibleassets January 12, 2017
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5
Manbabies - they look like men but act like babies

looking for a mammy not a girlfriend. incapable of taking charge and act immature
Manbabies - Looks like a man - acts like a baby
by Keronica November 22, 2012
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6
Any man whose beer belly prudes out over his waistline causing a look of pregnancy. Side effects include low testosterone levels (man PMS), lactating man boobs, and sempiturnal diarrhea of the mouth.
DAMN, Jimmy's caring a man baby! Yeah I heard he's due next week. Well at least it matches his man boobs.
by Nate Blaze July 25, 2008
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