mainline

[meyn-lahyn, -lahyn]
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verb (used without object), main·lined, main·lin·ing. Slang.
  1. to inject a narcotic, especially heroin, directly into a vein.
  2. to use or enjoy something without restriction: to mainline on TV movies.
verb (used with object), main·lined, main·lin·ing. Slang.
  1. to inject (a narcotic, especially heroin) directly into a vein.
  2. to use, enjoy, or imbibe (something) without restriction: mainlining coffee all day long.
adjective
  1. having a principal, established, or widely accepted position; major; mainstream: the membership of mainline churches.

Origin of mainline

1935–40, Americanism; v., adj. use of main line
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for mainlining

vaccinate, shoot, inoculate, jab, mainline

Examples from the Web for mainlining

Contemporary Examples of mainlining


Word Origin and History for mainlining

mainline

v.

also main-line, 1934, from main line in American English slang sense "principal vein into which drugs can be injected" (1933).

Online Etymology Dictionary, © 2010 Douglas Harper