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1.
This can be used when referring to someone who is a douche, asshole, dumb ass or are full of themselves. More specifically, some who can't keep their damn mouth shut!
"Wow! I can't believe you told them that! You pulled a Dirty Richardson, douche bag!"

"Did you really just do that!? You're such a Dirty Richardson!"
by Karma$@btch October 04, 2011