An insult. Sort of like fucker or bitch.

The Mud that lies on the bottom of a creek bed. Characteristics - slimy or chunky (one or the other, and never with rocks), like clay, but has the smell of shit or shite.

When spoken, used in replacement of any noun, verb or adjective.

Moop has become a way to say "Hi" or "Hello" in the game World of Warcraft. It is used to say "Hello" in guild chat but the most common use is as a General Chat salute in high level raid instances, when a player wishes to make his/her presence known to all other players who are zoned into the same instance.

Repsonses may vary from "Hey Freddie " to "STFU you nab we are raiding here" which often leads to a spate of general chat spam and abuse.

Moop has many different definitions that people have come up with over the years, however no one has got it right.
Moop is another way to say the fuck word with no one knowing what your talking about

1. burning man term means "matter out of place"/ litter, major no no.

I GIVE ANOTHER DEFINITION...#2. (hehe) is what happens when muppets (or silly creatures) poop, particularly at burning man...

someone who has an annoying laugh, and laughs at his obviously not funny jokes

Moop - When u attempt to drink a half gallon of milk and get sick. Then you run and go to the bathroom and "moop"
moop looks like runny white poop (liquid out of your anus)
MOOP = milk and poop