Can I sell oregano and call it weed?

Selling oregano and labeling it as 'weed' might seem like a hilarious shortcut, but it's a terrible idea. First, you're misleading your customers, and second, you could attract unwanted legal attention depending on local laws about cannabis and counterfeit products. Just sell oregano as oregano unless you want customers who know the difference—or worse, the cops—knocking on your door.