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Contrary to popular belief, not all manboobs are caused by fat. Some men are naturally born with higher amounts of estrogen then others and once they hit puberty start growing actual breast tissue. In fact, almost 1/3 of evry male has some form of it, though it may not be noticable.


But yes, most manboobs are just fat on overweight people.
King Tut had manboobs caused by estrogen. I saw it on Discovery Health Channel.
manboobs by Mike April 22, 2004
Related Words

Manbound  

A Manbound is something a man must do when he does something that could be considered feminine or gay. It is like a rebound that only a man can do.
Oh shit, I just was just talking really gay on the phone to my girlfriend and my roommate Big Joe overheard me. I have to manbound by chugging a beer.
Manbound by tiger3420 March 9, 2009
A term that refer to one who is more manly than anybody or anything else. These people are often said to be "born of man" or "Mantastic" If you are ever graced by the presence of one who is Manborn you will know almost instantly due to your sudden urge to masturbate and uncontrollable orgasms.
Used in a sentence...

"Look at that Manborn hes so damn sexy!"
"Yea if i was a chick i would totally bang him"

or...

"Why do i have the sudden urge to shove this broom up inside me?"
"Thats because there is a Manborn over there"
"Why thank you for the information good sir"
"No problem, now you and the broom go have fun and i totally wont be watching from over there with these binoculars"
"Thanks mister!"
Manborn by Manborn November 26, 2009
Something that fat guys have, similar to a woman's breasts, but nowhere near as attractive
If you searched for this, you probably have manboobs.
manboob by Freak July 28, 2003
Breasts found on fat, overweight men.
That Sumo Wrestler had a huge pair of manboobs.
Manboobs by Glittery Goddess June 27, 2004

Manboner 

When a man has a hypothetical boner for another man. i.e. mancrush. This does not mean that the man is actually sexually attracted to men, just that if he were attracted to one, a certain man would be it.
Dude: I'm can't chill, I'm going to the gym with Alex.
Chick: I figured, you've got a total manboner for him.
Dude: Shut up.
Manboner by MC Shopping Cart October 14, 2011