That Guy 

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.

That Guy by cdizz July 23, 2006

That Guy 

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.

“Who shall we pick to be our new CEO?”
“I nominate That Guy!”

That Guy by Lugs-o October 18, 2004

That Guy 

Calling someone "That Guy" is saying that they would obviously be the one that would do a particular thing. This reference can only be made after the event has happened.

Person 1: Dude I'm so sorry but I just clogged your toilet again.

Person 2: Wow... You would be That Guy that clogs my toilet more than once.

That Guy by Ike Nwamgbe September 29, 2011

that guy 

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".

that guy by lUK February 19, 2004

that guy 

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

Townsend, quit being THAT guy

that guy by bluefalcon3290 April 22, 2009

That Guy 

Biggest Penis.

That Guy has the biggest penis I have ever seen.

That Guy by Crystalice111 September 3, 2018

That Guy 

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

That Guy by The Legacy December 28, 2005