to show off how street or urban you are.
usually done by taking up sports such as basketball/streetball then boasting about how gangster you are for doing it.
sometimes done by white boys trying convince people they're not from suburbia but more commonly by nerds behind computers trying to "talk" tough.
originates from the Tolworth area of London.
check out greg dat tolworth mandem trying to ragoflex by putting that ball through his legs