(US) A submarine sandwich: a po' boy. / Used other than figuratively or idiomatically: see poor, boy.

(historical) A form of male youth culture which originated in London in the early 1950s, later associated with American rock and roll music.

(chiefly Britain) An alumnus, especially of a public school. / A former member of a group. / (UK) An old man. / (UK, dated) A familiar term of address for a man of any age.

A male inhabitant of a city, or one who prefers city life / (Britain) A man who works in the financial sector (often capitalised).

(slang, Britain) A man denoted by his taste for loud clothing and flashy cars.

(Ireland, US) A young man who hangs around on street corners.

(US) A member of a fraternity in a college or university

(US, slang) A young man who lives in the "Valley", specifically the San Fernando Valley. / (US, slang) A young gay man who listens to 1970s genre music.

plural of boy racer

(idiomatic, US, slang) A contractor assassin or hit man