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Meaning of speedball

speed•ball

Pronunciation: (spēd'bôl"), [key]
— n.
  1. a game similar to soccer with the chief difference that a player catching the ball on the fly can pass it with the hands.
  2. any combination of a stimulant and a depressant taken together, esp. a mixture of heroin and cocaine or heroin and methamphetamine injected into the bloodstream.
—v.i.
  1. to take a speedball, esp. by injection.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.