that guy 

The guy who goes to a high school party after he's graduated high school.

i can't believe "blank" showed up didn't he graduate like 4 years ago

that guy by Rob April 8, 2003

That Guy 

He fools you once, you're mad. Fools you twice, how could he. Fools you three times and he's officially that guy, you know the one. He goes to the bar and he's like "This suit is officially Georgio Armani, my dad knows him", FUCK YOU. I AAAAAIIIIINN'T HAVIN THAT SHIT!

Nightshade is officially that guy

That Guy by Unknowni123 September 2, 2013

that guy 

a person who gives himself nicknames, laughs at his own jokes, and goes around acting like he's cool.

Wow. Have you been around Mike lately? Yeah... he's really being that guy.

that guy by getatmeplz1 May 5, 2011

that guy 

1. (n.) The guy who wears the t-shirt of their own band. 2. (n.) The guy who wears the shirt of the band that he has come to the show to see. 3. (n.) The guy who buys a shirt at a show and puts it on over whatever shirt they were previously wearing.

Dude, don't be that guy.

that guy by richbastard March 26, 2003

that guy 

thers a "that guy" in every situation, he could be that guy who ate the last slice of pizza, or that guy who hit on your girl friend, that guy who who begs for money at lunch, or that guy who FUCKING SHOOTS DOWN YOUR GOD DAMN CHOOPER GUNNER WITH 3 KILLS TO A MOTHER F-ING NUKE!

Guy 1:Yeah i was on a 23 kill streak and that guy shot down my Chopper ginner...
Guy 2: Wow what an ass whole...
Ryan Sandage: Hey guys!

that guy by A concerned Citizen! March 14, 2010

That Guy 

A person in the background that draw attention from the main subject

Look at "that guy" in the background of this picture grabbing his balls

That Guy by J- sus January 20, 2006

that guy 

Someone who shows up at a party with a guitar in a pitiful effort to attract the opposite sex.

"Donovan put the damn thing away, your being that guy again."

that guy by TheLuciferEffect January 29, 2009