mainline

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mainline

(mān′līn′)
v. main·lined, main·lining, main·lines Informal
v.tr.
To inject (an illegal or addictive drug, such as heroin) directly into a major vein.
v.intr.
To inject a drug intravenously.

main′lin′er n.

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
References in periodicals archive ?
DELAYS on the trains are nothing new and perhaps that explains why there are so many delays in making decisions on the future of the railways, especially our main-line services up to Paddington.
The A1 Steam Locomotive Trust has built what is the first new main-line steam locomotive in Britain for almost 50 years at Darlington Locomotive Works.