A man boob. Primarily found on overweight men but can sometimes be found on average sized men, which is often an indication that they used to be overweight.
OR
The breasts of overweight women that look remarkably like men.
My moob got stuck in a paper shredder. I need to lose weight. After I get out of the hospital of course.
A wierd random person, a general name for people who like fun and they like being strange.
Moob can be used a verb, as a kind of strange and unexplained weird action.
Livvie: OMG YOUR A MOOB!
Rosie: YAYYYAYYA I know.
Livvie: I'm a moob too.
Dogface: *moob attack*