Several dyed pieces of hair (usually found on the heads of scene girls) That are striped horizontally with a different color of hair, made to look like the tail of a raccoon. They are often worn as extensions (bought from hot topic) rather than actual hair.
Scene Girl 1: Hey, did you see Carol Chaos's new green and black coontails? aren't they rad?
Scene girl 2: Well, they would be...if they weren't extensions.
A clontarf is a feminized liberal male douchebag; a know-it-all phloom who has to have the last word in every conversation; a guy who uses puns, big words, and trivia questions to show everyone how smart he is; a dick weed who always corrects your spelling. Like a black hole, he sucks all other conversation out of the room so that he can only hear himself talk.