There is a stereotype that prototyping has to be a very tedious task that will take a lot of your time. This is not true, a prototype may be a quick and dirty option to test your ideas and design decisions.
Not every prototype is created with mockups, quite often I use wordpress to quickly “hack” a website together to test an idea. For situations when I need to validate a business idea, I find myself using wordpress or html+css prototyping. Make a few quick sketches on paper and then code.