Mainlines | definition of mainlines by Medical dictionary
mainline (redirected from mainlines)
Also found in: Dictionary
v. main·lined, main·lining, main·lines Informal
To inject (an illegal or addictive drug, such as heroin) directly into a major vein.
To inject a drug intravenously.
mainline A regional term most commonly used as a verb in the drug subculture, meaning to inject a drug, usually understood to be illicit (e.g., heroin).
mainline Drug slang verb To inject a drug