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Definition of Mainline
1. Verb. Inject into the vein. "She is mainlining heroin"
Generic synonyms: Inject
Definition of Mainline
1. to inject a narcotic into a major vein [v -LINED, -LINING, -LINES]
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1. Verb. Inject into the vein. "She is mainlining heroin"
1. to inject a narcotic into a major vein [v -LINED, -LINING, -LINES]