look up any word, like pussy:
 
57.
One who does something stupid, annoying, or pointless.

One who asks questions they know the answer to simply to try and feel less stupid.

Anyone who fucks up.
*proffessor writes 5+5=10*
Prof: See, the result is 5.
That Guy: duh.. don't you mean the result is 10??
Everyone Else: Shut the fuck up dumbass, stop being that guy.
by BigK1D April 28, 2004
 
58.
A person who is not important enough for anyone to remember their name. That guy is most likely a loner or socially awkward.
Who the hell is that guy and why should I even care?
by The Kazman March 03, 2010
 
59.
The guy driving down the road with his arm out of the window, holding a mattress to the top of his car.
"You don't wanna be that guy."
by jahburbie December 08, 2005
 
60.
1. a male who commits and act of stupidity in a public place.

2. the scapegoat for any act of stupidity you personally committed.
1. Dude! Look at that guy getting head from a fat chick!

2. Dude! It wasnt ME it was That guy!
by CAck Master June 25, 2003
 
61.
"THAT GUY" is the guy everyone wants to be but cant...
Girl 1: hey sara whos that guy.

Girl 2: idk but i wanna meet him.

example 2

Guy 1: yo dude whos that guy flirting with my girlfriend.

Guy 2: idk but dont mess with him cuz hes "THAT GUY".
by "THAT GUY" August 13, 2006
 
62.
go to www.dontbetheguy.com . That will provide all the definition you need
Don't be the guy who leaves the seat up.
by Jamie May 03, 2004
 
63.
- A person who looks, talks, and acts exactly how other people, which you have grouped together as similar, operate in any given situation.
-That Guy

-The fat Hawaiian burger hut owner
-The rich fat Italian
-The fat Chinese kid (SEE CHUNK) who gets good grades and is at least top ten in the pokemon online challenge
-that black girl who takes your order at dirtys and even telemarkets to your cell phone
-the bald/balding short guy with glasses
-The ratty or rodent looking type
-goat looking type of people

by Richard6969 January 06, 2006