acne of le back. see also chacne (acne of the chest), shacne (acne of the shoulder) and lacne (acne of the legs]
"She could be a total babe if she didnt have that shit load of bacne"
"yeah i know, pop that shit!!"
That random pimple that appears on your knee from out of nowhere.
"How did you did a pimple on your knee?" "I don't know man, it's some crazy acknee."