A term that encompasses the deficit in emotional awareness often exhibited by college freshmen compared to most upperclassmen. Symptoms can include but are not limited to: crippling insecurities that require massive reassurance to quell; flaking repeatedly; early onset "what are we" talk; lovebombing; colossal mood swings. Prepare for a rollercoaster.
Exact numbers are unknown, but it is suspected at least 30 college credits (studio art not included) are required to mature beyond Freshman Brain.
Example 1:
"Yo man are you still talking to Anna?"
"Nah man.. I couldn't handle the Freshman Brain."
Example 2:
"Bro. Maddie wants me to tell her who I hook up with though she and I aren't exclusive."
"Yeah that's crazy. Freshman Brain."