When a girl is ridiculously hot or beyond hot on a normal scale. This can and will make an individual stupid or unable to conjugate a thought. It is above a 10 on a scale of 1-10 and she is more than just boner-ific.
That girl is stupid hot ***drools and becomes stupid, unable to think about anything and eventually gets caught checking "that girl" out.
The point when a statement has become so stupid that it is impossible to continue with anything that could be considered even close to rational or intelligent.
Guy 1: Justin Bieber isn't half bad dude.
Guy 2: Dude, you just crossed the stupid horizon.