If you record a million orders to yourself, that's not money laundering. Though, unless you already paid tax on that money you're using to purchase the "pizzas," you are committing tax evasion. Because you're essentially giving pre-tax dollars to your private company.

Until the million orders are paid with by the money I made illegally?

I mean yeah. Money laundering is just tax evasion and fraud with illegally gotten money. We treat it differently than regular tax evasion because it's a more serious crime, much like how pre-meditated homicide is treated differently than regular homicide. Does that make sense?

No. You've got the tax evasion (if any - certainly you could set it up so you're paying the full taxes) plus the illegal activity, so two crimes already there.

In fact, it's less serious for society if you launder it, because then you're paying taxes on money you wouldn't otherwise pay taxes on.