jock

Reader's Digest 5月号の記事 "The Odd Couple" から抜粋します。

All of that changed dramatically when I collided with one jock in particular: Chris Maxey, known to everone as Maxey.

"jock" が "jockey" を指すことがあるのを知っていますが、この "jock" はこの前の文脈からして、騎手でもディスクジョッキーでもなさそうですが、しばらく読んでいると次の文が出てきました。

I didn't know Maxey was a wrestler when we met that first night in the hall along with the 13 other secret society inductees, but he was clearly some kind of athlete.

やはり "jock" は騎手以外のスポーツマンも示すのですね。　辞書を見ます。

・Oxford English Dictionary: man or boy who plays or enjoys sport a lot, especially one who does not have many other interests: I was never one of the jocks at school.
・Collins Dictionary: A jock is a young man who is enthusiastic about a particular sport and spends a lot of time playing it. Some people use this term to suggest that the person has few other interests and is not very clever.: ...an all-American football jock.
・Cambridge English Dictionary: a man or boy who is enthusiastic about and good at sport: He didn't want to be thought of just as a dumb jock who played football.

運動能力に優れているスポーツマンというより、他の事には関心を示さない、あるいは能力のない運動バカのニュアンスがありますね。