Sentence:  It was Sonny's idea to ally the various clubs under a diamond-shaped "<WSD>one-percenter</WSD>" patch. He took it a step further by becoming the first Hells Angel to have the famous "<WSD>one-percenter</WSD>" drawn on his arm. 
Meaning of the word marked with <WSD> tags:  An outlaw biker, such as a member of the Hells Angels motorcycle club.