Mainliner 

One who does drugs such as heroin by means of shooting up in a vein. Intraveinously

Hes a mainliner druggie

Mainliner by Kyleigh January 28, 2006

mainliner 

One who injects drugs into their bloodstream with a needle.

Ohmygod, he's not only a mainliner, he reuses his works! Do not exchange any bodily fluids with him no matter what.

mainliner by mjrn April 11, 2006

mainlining

the intravenous injection of a drug. which means using a needle to get a drug into your vein, to absorb it through your bloodstream. a lot of drugs can be taken this way, the most commonly associated drug being heroin.

Layne accidentally overdosed by mainlining heroin.

mainlining by two blue lights December 9, 2008

coefficient of manliness 

It is a coefficient calculated by dividing your " penis length" by your height and then multiply the result by 100. (MaN=(penis length/height)*100).We measure it in cm and the final result will show us the percentage , how much of your body height is your glory.

What's your manliness coefficient?
I've got higher coefficient of manliness than you
What is your boyfriend's coefficient?

coefficient of manliness by Gizmino March 31, 2021

mainlander 

Referring to the Chinese who are not Hongkonger, people form Macau or Taiwan. So few of us are not Communists. These people are awful according to anyone who is not from the Chinese Mainland. But if you actually get to know some younger people with good education (or some who are not studying in the terrible brainwashing school system/studying abroad) they are normal/nice people just like most human beings.

A mainlander can be a devil or a good person, it depends on who you meet in life.

mainlander by Why Do U Care What I'm Called July 22, 2020

mainline 

To inject a drug, usually heroin, into a vein. Also used to refer to the drug itself.

"That chick was mainlining heroin daily till she OD'd."

From Queensryche - Operation Mindcrime:

"Had a habit doing mainline
Watch the dragon burn
No regrets, you've got no goals
Nothing more to learn"

mainline by eidolon July 17, 2004

manlier 

A dude who surpasses many other dudes in his dudeliness.

Adam.
Someone might say "Dude, that dude Adam is way manlier than I am."

manlier by the nelius July 7, 2007