A person, who once a month under a full moon turns into a retarded person. This condtion is usually transmitted from being bitten or scratched by a retard.
1.
"I was walking my dog last night, and we were attacked by Weretards."
2.
"That retarded kid, Jim, bit me yesterday. I better go to the doctor and check to make sure i'm not weretarded."
A WordTard is someone who makes up a word in order to submit it to a dictionarywebsite because they think they are clever or funny, but in fact they are neither.
Used in reply to something odd or weird that you wouldn't agree with or understand, but go with anyway but it's used by harry potter fans.
Also see:weird flex, but okand wingardium leviosa