"dude, i had 3 exams to study for over the long weekend and i pushed off all my studying till 10:30 last night  "woahh, you must have major brain drain
when you study way to hard and your brain is drained
""dude, i had 3 exams to study for over the long weekend and i pushed off all my studying till 10:30 last night  "woahh, you must have major brain drain" What is the definition of "brain drain"?