Real Dictionary

Teddy boy
countable noun: A Teddy boy is a man who dresses in a style that became popular in the 1950s. Teddy boys were associated with early rock and roll music, and often regarded as bad or violent.

teddy boy in British English
a British youth of the 1950s or early 1960s who affected flashy dress, esp. of a neo-Edwardian style
a rebellious British youth who, in the 1950s and early 1960s, affected the dress of the reign of Edward VII
noun: (in Britain, esp in the mid-1950s) one of a cult of youths who wore mock Edwardian fashions, such as tight narrow trousers, pointed shoes, and long sideboards