it happens during the end of the semester when you're studying for finals and say stupid shit
I'm gonna need some powerbull to get through the night... I mean red bull. Sorry, finals brain.
When you stop functioning correctly because you have fried your brain trying to study for finals.
A: "Then I have to psychology for study."
B: "What?"
A: "I meant to say, I have to study for psychology. I just can't speak correctly."
B: "You just have finals brain."