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 ?
"We represent mainline Christianity today, which the NCC does not."
If any of your readers find that their path takes them away from mainline Christianity but they still feel a need for the spiritual, their local UU church might be a good place to start.
Scholarly literature, such as the recent The Devil: A Biography, by Peter Stanford, claim that the satanic figure is an intellectual embarrassment to mainline Christianity, whether Protestant or Catholic.