CWord is the alias of Marvin Sanchez, a top rated Halo player. He played on Nice Like Rice, who won 5th place at MLG Canada, the world's most renouned Halo competition league. NLR joined with professionalCounter-Strike:Source team, Devastation (www.team-DEV.com | #devastation), and now competes in Halo 3.
When it's inappropriate in public (or around your girlfriend) to use the word "cunt," or "the 'c-word'"... simply refer to someone as a "cword". It gets the point across with a minimum of vulgarity.
My girlfriend is japanese and gave me the cword pass, which means I can freely call her or any Asian person the Cword(chink) without getting beaten or chased.