I dated a guy in college who thought the expression "overtired" and the concept to which it related were, basically, bull shit.
I wonder if he has children now. And if he does, if he sings a different tune.
Says the mother of two exhausted children who are running around with dog toys in their mouths, barking to raise the sheriff, and trying to sniff one another's butt. Ya, they are definitely OVERtired.