A combination of the words "man" and "boobs." This is what happens when fat gathers in a male's chest area, and gives him the appearance of having breasts.
Usually seen in overweight males, but can strangely also occur in men who are not really overweight.
an abriviation for man boobs.
you can usually see these on fat ass brothers who drink and eat too much.
and generally they are seen holding a bucket of KFC.
OMFGmy brother has the biggest moobs I have ever seen because he's a fat ass with no life