n. a drug user who injects methamphetamine; an amphetamine user. (Drugs and general slang.) : Speed freaks, not heroin addicts, account for a high proportion of drug-related crime.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Medical Dictionary
Main Entry: speed freak Pronunciation: -'frEk Function: noun : one who habitually misuses amphetamines and especially methamphetamine
