Jason's Best Friend is an unnamed character in the movie Mean Girls. Almost every appearance he makes is along side Jason and vice-versa. He sits next to Gretchen Wieners in homeroom. Under Jason's ruling he may or may not have seen a breast dependent on whether he saw a nipple.
On the first day of school he had two cans of Coca-Cola and one Red Bull open on his lunch tray. He is in Coach Carr's health class with Cady Heron.