Similar to, but not to be mistaken for "eye liner", it is the rimming of the male eye with usually a charcoal black color, and done voluntarily. Usually done by rock stars, emo kids, and more recently hipsters, it is a word used to masculinize a usually feminine product, thus making it more acceptable, at least for themselves. This is the main purpose for calling it by something other than simply eye liner, a term used by either women, men who cross dress as women, or men who never actually wear it themselves.

It can also be used ironically by a second party, making fun of those belonging to the aforementioned groups, aka emos, wannabe rockstars, hipsters, etc.
Girl: Hey squirt, will you let me borrow some of your eye liner?
Boy: Its not eye liner! Its Guyliner! ...MOOOOOM!! Sissy's stealing my things again!!

Jock: I bet you don't attract as much poon as me with your stupid Guyliner! Ah ha ha!
Emo: *cries softly as he Tweets about his problems*
by 4UmyMtty August 31, 2010
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Eyeliner worn by a guy. Guyliner used to be only for gays, punk rockers, or metro sexuals.
Girl 1: Did you see Ryan?!
Girl 2: He was wearing guyliner, the little weirdo.
by Double T from AZ January 4, 2008
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This is eyeliner worn by men, it could be any eyeliner.
This could mean the man is gay.
Guyliner can even be tattooed on the face(a woman can do this too).
Girl1: Do you see that guy? it looks like hes wearing makeup!
Girl2: Omg! It must be guyliner!
by Guys2Gays. June 16, 2011
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n. Periocular makeup worn by rockers, fluffy movie stars, brigands and other gentlemen with flair and a certain lack of torn rugby jerseys in their closets.

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That Johnny Depp, he likes to wear guyliner. It's like he has a free pass or something.
by gnostic3 September 16, 2015
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The eyeliner that emo guys put on. Its also used for guys in movies as well. Girls really do find it creepy.
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Regina's name for Killian Jones. This happens because Killian (OUAT character) wears eyeliner and he is hot!
Regina: I'm stuck with you and Captain Guyliner making eyes at each other.
Emma: We're not making eyes at each other
by beholdtherollyjoger January 12, 2018
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an awesome guy that gets a 10/10 on time management in art. also has eyeliner for men. guyliner. and is a captain of all things dirty. captain. captain guyliner.
"Yo did you see that guy walk past?"

"Yeah that was Captain Guyliner."
by Band Dork 2k19 November 15, 2016
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