What is Mooper?
1.
It is a person who talks about stuff which does not interest his audience. Somebody who speaks of nonsense. Moopers are commonly found in offices with management positions. etymology: mo - mouth oper - from pooper, pooping (crapping)
Stop mooping! you mooper.
See
2.
a person who seems to exhale gas/crap from his/her anus very frequently
I don't want to hang around that mooper because I get nauseated when I do.