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. Slang.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. Slang.to take a speedball, esp. by injection.