Definition of "mainlining" [mainlining]

• Present participle of mainline. (verb)

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• "Heroin can be injected into a vein ( "mainlining"), injected into a muscle, smoked in a water pipe or standard pipe, mixed in a marijuana joint or regular cigarette, inhaled as smoke through a straw, known as "chasing the dragon," snorted as powder via the nose."
• "She nearly goes mad, until she reaches San Diego, where she escapes her mother's infatuation with fashioning odd Fimo necklaces by "mainlining""
• "Any disruption to the main goal of the class, i.e. learning we are reaping the benefits of “mainlining” any disruption needs to be removed or learning stops"