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.
A chill bro who isn't embarrassed to be good at math, especially algebra. Also the the primary state of the pokemon "Cave Dweller". Evolves into "Geobrah" and then "Cave Dweller".
That kid is such an algebrah. He's so chill but he rocks at math!