1. When two or more guys kiss and make out and get off together. A quick kiss or grope doesn't count. Extended tongue action and fondling are required for an act to be guy on guy. Most of the time this ends when they wank each other until they come (because guys are good at wanking). Guys who are more familiar with each other, or kinky, will 69 and suck cock and rim and have butt sex.

2. Porn for girls. The type of porn in which all participants are hot and generally getting off on the proceedings. Participating in a guy on guy moment is the number one female fantasy.
Julie: Did you get that Mad TV guy on guy youtube clip that I sent you?
Jodie: Omg that was so hot, do you think that all guys really do that?
by PHolden May 20, 2013
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Not quite exactly, guy in guy, or guy on guy. It's more like guy with guy or guy with guys. Semi-naked to naked men hanging around brushing up against each other and checking each other out.
Hey dude, remember that night of guy around guy'ing? THAT SHIT WAS AWESOME!
by John Futtbuck August 13, 2007
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What many, many females fantasise about, much like guys' attraction to girl-on-girl action, only this version is far less socially acceptable and thus kept a closely guarded secret, even more closely guarded than masturbation. Many teenage girls in particular have a special attraction for punk/emo-type guys getting together (see: emo boys who kiss)
If you've only just gotten access to the internet, where girls are free to express their love for guy-on-guy action anonymously, and refuse to believe this, see fanfiction.net, which is full of these types of stories. 99.9999999999% of the authors are teenage girls...
by guy-on-guy action is hot July 09, 2005
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Greeting used often by overzealous lebanese guys. Is often accompied by a tour of the new apartment and mass quanties of 7-uP.
*door knocks*
Flying Star - Hello?
Noid - it's us
*door opens*
Flying Star - Guys Guys Guys
by foug January 11, 2005
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The most basic and predictable version of the male species, identifiable by an omnipresent baseball cap, reluctance to consume any alcoholic beverage other than beer, and general lack of conversation. Usually spotted in herds.

Shortens to: GBG.
I went to the batting cage on Sunday, it was nothing but guy-brand-guys flexing their guns and eating hot dogs.
by rebstevenson May 26, 2009
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a masculine, sports loving, sociable guy who likes to hang out with his buddies
Look at this guy.... he's the life of the party, now's that a guy's guy.
by Bhursty1180 August 18, 2011
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