The term "speedball" refers to a mixture of a stimulant (usually cocaine) and a depressant (usually heroin) taken together. The structure is a compound slang term combining "speed" (stimulant effect) and "ball" (heroin/cocaine mixture slang usage), describing the contrasting drug effects. It is commonly used in drug-related contexts and is associated with high risk due to opposing effects on the central nervous system.

英語での「speedball」の定義と意味

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