To receive head (oral sex) on the campus of Binghamton University, which is coincidentally shaped like a brain.
"So man, did you get some head last night?"
"Nah, we snuck into the lecture hall and she gave me some of that BU Brain."
"Nah, we snuck into the lecture hall and she gave me some of that BU Brain."
by Dixie Kong October 6, 2021
Get the BU Brainmug.