i am not that guy
You're not the retard. You're just trying to act like you're the retard so you can brag about it later and take all the credit.
"I'm not that guy! I'm the guy who takes all the credit!", You, after you failed a test and blamed the retard.
"I'm not that guy! I'm the guy who's better than the retard!", You, after you got the highest score in the class.
"I'm not that guy! I'm the guy who's not even a real retard!", You, after you got caught cheating.