A person who takes a simple decision not to do drugs and turns it into an obsessive militant and ocasionally violent and loud lifestyle that revolves around hating drugs. In the closed-mind of a hardliner, drugs are wholly evil (sometimes not backed up by any real evidence and definitely not backed up by any firsthand experience) and all recreational drug users are stupid, worthless, bad people who belong in jail or dead. Known to defend their claims that marajuana is the worst thing in existence even when presented with evidence that it isn't actually harmful and that people who ocasionally smoke it can actually hold down a job and make some contributions to society (which is in stark contrast to their beliefs)
A hardliner is somebody who thinks harboring an irrational deep-seated hatred towards all recreational drug users is a healthy alternative to doing drugs.
by DDSmith August 16, 2007
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someone who has a strict pespective of something
Those hardliners need to lighten up. They take music way too seriously.
by Light Joker May 15, 2007
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To use drugs intravenously
Junkie 1: Yo lets snort some heroin
Junkie 2: Fuck that let's hardline it you get more fucked up
by watzgood November 6, 2010
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Someone who was hardline was a person who believed in the complete liberation of all animals, human and non-human, through purity of living and violent and non-violent direct action against those whom they deemed to be "the oppressors." One who was hardline adopted a strict lifestyle based upon both vegan and straight edge principles. Hardline folks were also pro-life, and believed sex was strictly for procreation.

Hardline was a violent movement and officially ended in 1999 via a decision by the Hardline Central Comittee.

Today the hardline has adopted the mantle of the People of Allah.
I was never hardline.
by Ian Vegan November 4, 2003
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1.)A straight edger who would beat you up for smoking a cigarette.

2.)A cokehead who does a rail waaaaaay too quick
Hardliner broke my jaw over my pack of squares, ya dig?
by dizzy mcfucktwat August 26, 2003
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an attitude pertaning to the straight edge lifestyle that is whack. it often involves forcing beliefs onto others!
awww comon bro, dont be fakin on me, you is turnin hardline.
by bwhaha July 24, 2003
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a 90's band that sounds like it came from the 80's. Pretty solid, had the lead guitarist from Journey for a time and the lead singer went on to work with crush 40
Hardline is a pretty Bitchin Band
by hadomaru January 15, 2010
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