will have been mainlining

• future perfect progressive

  future perfect progressive

  Used to describe a continuous action that will progress up until a designated point of completion in the future.

  of mainline.
  mainline

  verb (used without object)

  to inject a narcotic, especially heroin, directly into a vein.

Related Words

• dominant
• key
• leading
• main
• major
• outstanding
• paramount
• predominant
• preeminent
• primary
• prime
• prominent