a game similar to soccer with the chief difference that a player catching the ball on the fly can pass it with the hands.
Slang. any combination of a stimulant and a depressant taken together, especially a mixture of heroin and cocaine or heroin and methamphetamine injected into the bloodstream.
verb (used without object)
Slang. to take a speedball, especially by injection.

1940–45; speed + ball1

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World English Dictionary
speedball (ˈspiːdˌbɔːl)
slang a mixture of heroin with amphetamine or cocaine

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

speedball speed·ball (spēd'bôl')
An intravenous dose of cocaine mixed with heroin or an amphetamine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Speedball's special powers came in the form of bouncing off walls.
Some heroin abusers use a combination of heroin and cocaine, known as a speedball.
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