Jack the mainline

Doing heroin intravenously in the style of Robbie Williams. See also rock the mainline.

From Robbie Williams' "Rudebox":

"Ok then check the tan line
Make your body shape
Like you're stood on a landmine
Call me on my mobile
Not the landline
And jack the mainline
At the same time"

by Some Fresh Money September 18, 2007

MainLine

to render righteousness with perfect fidelity, especially using emerging information and communication technologies. A MKULTIMATE asset commandeered from MKULTRA.

During MKULTRA, every mainline was murder; now, we are fortunate to be able to MainLine America; now, every MainLine is a Miracle.

by Medicine Owl February 8, 2023

Mainline

To watch a large amount of a geeky television show, episode after episode, for a long period of time. A season of Buffy in two days, for example.

Similar to marathoning movies or chain smoking, but more geeky.

"I just mainlined the first 3 seasons of Angel"

"I'm going to go home and mainline the LOTR movies."

"Wheres Ferg at?"
"Oh, hes at home, sitting in the dark, mainlining Simpsons episodes"

by Anna Heavens January 27, 2009

mainline

(n) The front-running leader(s) of an industry; not the imitation spin-offs. Reserved for the select few whom others try to imitate albeit never successfully. If you are not mainline you are hopeless and should probably just quit what you do, now.

(adj) Describing an action that would only be done by someone/something that is mainline.

Guy 1: Why does that guy drive such a shitty old car if he's a lawyer?

Guy 2: He must not be mainline. If he were, he would drive a BMW 5 Series.

*******
Guy 1: Lebron James is overrated.

Guy 2: Seriously?! He is the most mainline basketball player of this generation.

by Reacharoundartist May 22, 2010

mainline

Weaponized wireless telepathic communications and informations system used by covert US military-intelligence in the Targeted Individual program.

The military had their own voice-to-skull...they called it the mainline... it was voice-to-skull.

by Medicine Owl February 8, 2023

Rock the mainline

To get "high" on heroine through the means of an introvenus-needle. I.e. - Shooting up.

Addict: Yo, dog... Yo got the shit to lemme rock tha mainline?
Dealer: Fo' sizzle ma nizzle, that'll be fiddy.

by God May 20, 2003

Mainline

A person's main significant other, even though they may be dating several people at once.

"I got a lot of chicks, I ain't gotta lie. But you keep it real, so you my mainline." - Ray Vicks

by BRNOLA July 12, 2009