Another word for boner. It originated from an unforgivable remake video on youtube. The narrator says " my dick was harder than a math test". Thus sparking math test as code for boner. The significance of math test is that it is used as code for males. Primaraly in school, for instance if your sitting down and you have a boner and your teacher calls on you, you tell your fellow male friend that you have one and he vouches for you by taking your spot and going to the front of the classroom to spare your embarrassment of having a boner.
"dude epic math test"