Some guy who goes around in forums and guestbooks and posts extremely offensive remarks. For example in an eating dissorder guestbook he will post something like. "Hi ya big fatsos!!"
One can "pull a redmoo" by accidently bumping into a visually impaired person and say. "HEY WATCHIT YOU BLIND OR WHAT!!??"
by Paddy Walsh March 22, 2005
Get the redmoomug.