An agreement doesn’t stand above the law. I’m pretty sure that clause is void for, basically, being illegal. Not a lawyer though.

I'd suspect that it's void for those reasons too but I'd also guess that any lawyer would say "You shouldn't have to suspect. Only write contracts with terms that have clearly-defined meanings that will be understood by the court and jury the same way you understand them." The point of the legal system is predictability, after all.