Found 2 items, similar to mainline.
English → English (WordNet) Definition: mainline mainline v : inject into the vein; “She is mainlining heroin”
English → English (gcide) Definition: mainline mainline \main"line`\ (m[=a]n"l[imac]n`) v. t. 1. to inject (illegal drugs) into the vein; as, he preferred to mainline heroin rather than sniff coke. [WordNet 1.5]