Shortened from Sweeney Todd which is cockney rhyming slang for Flying Squad.
Also a Television show in the UK about the Flying Squad featuring John Thaw and Denis Waterman as D.I. Jack Regan and D.S. George Carter.
"We're the Sweeney son, and we haven't had any dinner..." Famous quote from Jack Regan in the TV show.
Hand in Texas Hold'em, a six-two off-suit, named "The Sweeney". This has a propensity for flopping 2 pair and turning a boat. It's broken pocket aces and pocket kings in the same night. It should only be played by those with faith in the Sweeney, or if it comes as any Sweeney walks in the room. Never try to turn it against a Sweeney as it will only end up hurting you.
What kind of idiot would call $20 with a 6-2? I'm golden with my pocket aces.