A combination of the words "wee" and "retard." Coined by a Los Angeles teenager in reference to his little sister's friends. Often used in a redundant context, such as "little weetard" or "stupid weetard."
My sister is having all her stupid littlefriends over for a weetard party, wanna crash it?
Person 1: We've been teaching your little brother his long division for 2 hours already. Why can't he understand us?
Person 2: He's a wittle weetarded
Person 1: What did you just say?
Person 3: She said he was retarded
Person 1: Oh
A little retard that likes to pick on women, or reposting and photoshopping their pics til they leave a forum or bulletin board, turning it into a sausagefest. And then changing the subject of every conversation to homosexuality.