Brian's forehead is a forehead that no one can take their eyes away. So much that people roast him about it and he has to move schools because of the constant roasting. Even moving to different schools might make the roasting stop, his "friends" joke about the unreal forehead.
Brian's forehead is an embarrassing forehead.

Gabe - "Brian, your forehead is like deforestation."
by yaddassi May 25, 2017
Get the brian's forehead mug.