What is Ass-rule?
A rule of which is never actually defined or warrented, a rule pulled out of thin air, or ones ass.
Ass ruler: "I can't stand you being in the house all the time, goodmorning go away!"
Ass ruler: "No you can't go over to a friends house twice in one week, I want to be able to keep an eye on you (as much as I hate you)"
Being a rule that has a double standard and is thought up on the spot it has been pulled from ones ass, therefore being an assrule.
"Dad I just downloaded World of Warcraft"
the father being too disgusted with his son to say anything blurts out
"New rule bed time at 7 oclock!"
"She has no reason to tell me not to go outside she can't even stand it when I'm in the same room as her. She's making up an ass-rule."