r-tard - Wiktionary, the free dictionary

2006, Make Love, Not Warcraft:

Randy: You've been on your computer all weekend, shouldn't you go out and socialize with your friends?
Stan: I am socializing r-tard. I'm logged to an MMORPG with people from all over the world and getting XP with my party using TeamSpeak.
Randy: ... I'm not an r-tard.