From Longman Dictionary of Contemporary Englishjockjock /dʒɒk $ dʒɑːk/ noun [countable] informal 1 American EnglishDS someone, especially a student, who plays a lot of sport and is often considered to be stupid2 British EnglishSAN someone from Scotland – sometimes used in an insulting way3 a disc jockey
Examples from the Corpus
jock• She is a jock from a family of jocks, articulate only in that special, odd way that coaches are articulate.• If he blows, take him out, put another jock on.• I sat there quietly listening, trying to decide what to do with his forced jock talk.• The jocks lined up to keep any sympathizers from joining us.Origin jock (1900-2000) jockstrap 