LOL. "Jock" is something many people put in their profile name (I'm thinking gay.com) in order to enhance their profile. Like putting "vgl" (very good looking) or "hot" in one's profile name. (Which has led me to quip "so many 'jocks', so few athletes.")
The web definition(s)of jock: athlete: a person trained to compete in sports
The term jock is a classic North American stereotype of a male athlete. The etymology of the term jock is derived from the word jockstrap, which is the athletic support garment worn by men who engage in physical sports. ..
I believe for the purposes of this site the term "jock" is a little bit more broad since many of us are beyond our school years and have varying degrees of ability -- though, being a "jock" is much more than just watching or discussing sports. I think you need to break a sweat from time-to-time doing some kind of physical activity.
Well see, a lot of athletes don't like to be classified as "jocks," mainly only the football(American) and baseball players like that title. While the real athletes like Track&Field, Cross Country, Soccer, etc. prefer the title of Athlete. Because thats what we are competative athletes. NOT JOCKS!!!