When you take an algebratest in class and your mind has a stroke and disables your ability to think. This creates and alge BRUH moment and you get a D or lower on your math grade.
Today I had an algebruh moment on the easiest test of the semester because I thought about something stupid.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi