Any person who consistently shows disregard for the normal social behavior of any given social situation, or has no concept of what the normal social behavior is for any given social situation. In addition, this person must evoke a feeling of empathy from within people that are more socially skilled than "That-guy." If this person does not evoke pity, tham he is just a jerk.
There is always that one guy at the dinner who is always there when you are, but you never get there before him and he never leaves before you do, so, you just kind of assume that this person lives at the dinner. And he'll know all the waitresses by name, and probably dropped out of college, but you don't really care enough to get the real story, and you already have enough neative vibes toward this guy because of his akwarness that it really doesn't bother you to write him off as a waste of life.
by Dj Galley October 21, 2004
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The guy who seems to be in every movie, every TV show, but you still don't know his name.
Girl: "Hey, look! Its him again!"

Guy: "Who?"
Girl: "You know, the guy from that movie we saw...? That guy!"

Guy: "Right."
by bowlingbabe October 16, 2010
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That Guy refers to a person who appears in the background of a photograph often without the consent or knowledge of the photogropher of subjects of the picture. That guy often takes the focus of the photo off the intended subject. That guy is often seen making a funny face or rude gesture, commonly a blowjob gesture. There is a category on college humor.com of That Guy pictures.
I took a picture of my friends at the beach but That Guy is right in the middle of it.
by cdizz July 23, 2006
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Anonymous co-worker in your organisation. Possibly frozen in time from the 1980s and the toast of Wall Street. He’ll be ready to sleaze his way to the top, 80s style! He knows about business and has a tie. Also went to a lot of coke parties. The secret to his success is all about appearances. Outside of the office he goes back to the farm, shifts some paradigms and revolutionises outside the box. Liked the Safety Dance and died from Boneitis.
β€œWho shall we pick to be our new CEO?”
β€œI nominate That Guy!”
by Lugs-o October 18, 2004
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1. The one guy who always gets other people into trouble, is always fucking up at everyone else's expense, or is just making an ass of himself and everyone around him

2. Cadet Townsend of the UGA Army ROTC program
by bluefalcon3290 April 22, 2009
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Function: noun

a male that acts in a certain fashion in a given situation, fully knowing such act is considered rude, obscene, or otherwise frowned upon in normal social interaction.
Don't be "that guy" that cuts in line.

Didn't he just hit on the girl he knows you are dating? Yeah, he's "that guy".

Hey, can i bum your last cigarette? It's my last one, don't be "that guy".
by lUK February 19, 2004
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THAT GUY is the person who comes to your party gets completely wasted, passes out, pisses, and pukes all over themselves and your carpet; wakes up before anyone else and leaves without cleaning it up.
no example needed to explain this scenerio of THAT GUY
by The Legacy December 08, 2005
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