Black person, nigger, african-american.
Look at this walking turds lips.
A person that has a tendency to dress in brown frequently.
The word was created when Nick was wearing a brown shirt, brown sweater, brown shoes, and listening to his brown Zune. We then called him a walking turd.
Also used to define a UPS man (see turd on wheels)
Did you see Nick yesterday? He was like a walking turd!