Straight Edge is a personal choice that is not meant to be a joking matter. It is an oath that someone may make to themselves to not participate in recreational drug use, smoke, consume alcohol, or have promiscious sex. I think a true straight edge does it for themselves and doesn't ridicule others for not believing in the same view of this lifestyle.
waitress at the show: You wanna drink?
Heather: No, I'm straight edge so please don't ask anymore.
by XLiveXNowX July 13, 2004
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A person who does not consume alcohol, do drugs of any kind (even marijuana), smoke cigarettes, etc. They live a lifestyle and have a mentality of pride in their and other's courage not to do these mostly harmful activities.

Typically, kids who chose to be straight edge are associated with the "hardcore scene" and X or XXX symbols. However, many people who chose the straight edge lifestyle do not write X's on their hands and show it off, or any of the annoying crap associated with straight edge.
Me: I'm so glad we're straight edge.
Ethan: Me too, I think drugs and all of that stuff is fucking stupid to do. Getting wasted for a good time is lame.
Me: Yep. But let's not do that annoying XXX shit.
Ethan: Okay, cool.
by J. Archimedes July 19, 2006
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A philosophy begun by Ian McKaye and the Minor Threat boys in the days of yore. Abbreviated sXe. It started out just no drinking, drugs, or smokes, then the philosophy was distorted into including veganism and no casual sex. Still not a terrible thing, until hypocrites in Utah decided "hey, this would make a good gang!" and totally raped the whole idea. Because, you know, it was meant to DECREASE violence and death. Not beat the shit out of the poor faggot caught with a beer in his hand. so...

good example of straight edge: Davey Havok or Justin Sane, basically anyone adhering to the original concept

bad example: Salt Lake City assholes killing hobos with cigarettes in their mouths
sXe used to be cool, then Utah bastards killed it.
by not important March 15, 2005
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a philosophy to live a clean, responsible and sober lifestyle; a choice that many, many people consciously make, except being "straight-edge" is an excuse to put X's all over yourself as well as before and after everything you write, to use a label to make your choices look better than everyone else's and belong to a clique.
Dave: "what's the difference between you and XStevenX - that straight-edge guy?"

Me: "well, both of us choose to live a substance-free and responsible life, except XStevenX is self-righteous, insecure douche-bag who needs desperately wants to be a part of another cliche clique, a needs a pathetic label to advertise his "morals" as being above everyone else's."
by wayuphighkitty April 30, 2009
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A name given to a personal lifestyle choice in order to make it sound 'cool'. The lifestyle consists of the respectful choices to not do drugs, have casual sex, or drink alcohol. Basically these people choose to respect their own body in every way. Some people that follow this lifestyle may put X's on there hands and a bandana over their nose and mouth in order to try and further make this lifestyle look 'cool'. For some that follow this lifestyle they may think it makes them better then everyone else and will go around letting everyone know they are 'straight edge', what these people don't realize is no one gives a shit. Others who follow this type of lifestyle will only let people know at appropriate times. These people are the respectful ones, but they still sound stupid calling themselves straight edge.
Guy 1: Dude do you want to smoke some, have a drink or find some girls to fuck?

Guy 2: No man I am straight edge.

Guy 1: Oh... alright dude that's fine, that's actually respectful, but I hope you know you sound like a Faggot when you say you are "straight edge".
by Sir Hello August 29, 2011
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Branched off of a song by minor threat. Wasn't purposely created. Straight Edge is not a set of rules, nor a movement. It is an anti-stupidity, anti-obsession, pro-positive, pro-alertness thinking idea.

Some kids took it too far and now it is tagged with a gang or elitist mentality.
"sXe"
by happy go licky June 27, 2003
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(n.) Straiht edge is the term coined by Ian MacKaye (lead singer of the early 80's punk band 'Minor Threat'). To 'have the straight edge' one must hold a great responsibility for his/her actions and most commonly not get involved with casual sex, drinking, smoking, or any other substances (living a drug free life) some straight edgers even go vegan (or become vegetarians) being straight is just more of a philosophy on life; a religion focusing on strength, self-preservation, and self-respect, some may call it.

unfortunately, many people are beginning to see the straight edge as the popular thing to do and is now, more than ever, just a trend
1) Ive got the straight edge!

2) sXe, XXX
by Jon Awesome December 31, 2005
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