i am not that guy
What you yell when you're not that guy, like you're trying to convince everyone that you're the opposite of that guy, but you're still kind of that guy.
"I'm not that guy! I'm the guy who says I'm not that guy!", You, after you failed your first test.
"I'm not that guy! I'm the guy who's not even a guy!", You, after you got kicked out of the lunch table.
"I'm not that guy! I'm the guy who thinks he's not that guy!", You, after you got a D on your report card.