well i'll try to explain the best i can, and if ya dont get me i'll post a pic ;D

its a part of your ear.. you know how there is the earlobe and the rest of the outside of your ear? well then you know how on the other side.. where your ear actually comes out of your head.. theres a little piece of cartlidge sticking out that goes over the opening in your ear to (i guess) protect it or whatever.. well that is what a tragus is.