According to the Chelsea Dagger Songfacts, lead singer Jon Fratelli (real name: John Lawler), wrote this for his wife, who worked as an exotic dancer with the stage name Chelsea. Her real name is Heather. The song title "Chelsea Dagger" is a play on "Britney Spears." (Chelsea : Britney :: Dagger : Spear)
The song is notably used as the goal music for the NHL team the Chicago Blackhawks.