(adj.) Below the line of what is acceptable behviour. Used to describe an insult that was a little extreme, but comes from physical fighting where Queensbury rules
and broughton's rules
dictate that no punches are to be thrown below the belt.
That was a bit below the belt
he hit me below the belt
Any person under 18, if they cant buy alcohol, tobacco or participate in sexual activities legally, it doesn't matter if its a he or she, if they are under aged they are considered below the belt.
Guy 1: hey dude, look at that hot chick over there.
Guy 2: yo chill dude, shes below the belt.
Guy 1: damn!....... she still looks good though.
Woman 1: OMG, look at that guy over there coming out the comic store, he is a hottie.
Woman:2 umm, i think you need to put your glasses on.
Woman 1: why?
Woman 2: hes clearly below the belt, and besides hes one of my students.