A scale to determine the hotness of a girl. Derived from the slang "boner" which was changed to bohner as an twist on the accents of people.
In the Bohner Scale, 120 is the hottest a girl can get. This means 120000 red blood cells per centimeter of dick tissue
60 is average
0-30 is BAD
negative numbers are so fucking bad, they make all the blood cells zoom out of your dick. the girl has to be HELLLAAA unbelievably ugly
person 1- " DAYUMMMMM Bob! look at that girl, shes definitely a 120 on the Bohner Scale"
person 2- "oh yeahhhh! she made my bohner shoot straight up man.