jock

Multiple Entries:
  jock    Jock  

Concise Oxford English Dictionary © 2008 Oxford University Press:
jock1

▶noun informal

• 1 a disc jockey.

• 2 N. Amer. an enthusiast or participant in a specified activity: a computer jock.

• 3 US a pilot or astronaut.

– origin C18 (denoting a jockey): abbrev.

Concise Oxford English Dictionary © 2008 Oxford University Press:
jock2

▶noun N. Amer. informal

• 1 another term for jockstrap.

• 2 an enthusiastic male athlete or sports fan.

– derivatives
jockish adjective.

Concise Oxford English Dictionary © 2008 Oxford University Press:
Jock/ʤɒk/

▶noun informal, often offensive a Scotsman.

– origin C16: Scots form of the given name Jack (see jack1).