4.nounAn athletic supporter worn by men to support the genitals especially during sports, a jockstrap.
5.nounA young male athlete (through college age).
6.nounAn enthusiastic athlete or sports fan, especially one with few other interests. A slow-witted person of large size and great physical strength. A pretty boy that shows off in sport.
7.nounA disc jockey.
8.noun(in combination) A specialist computer programmer.