beast infection comes from The commonly used term beast meaning that one looks tough, ripped, cut, has an intimidating presence,or that they are really good at something. Saying that someone has a beast infection is a slang or funny way to call some one or some thing a beast.
hat team must have a beast infection they win the championship every year.
dayum that dude has a severe beast infection
a male yeast infection
i didn't wash my jimmy for three weeks and got a mad beast infection