When one thinks about many subjects at once, and is still able to function while making sense. Different to multitasking; because multitasking is doing many things at once but multi-thinking; is thinking about many subjects at once and not necessarily doing something about it.
Writing a saucy danielle steel'esque novel, creating a dali'esque artwork, and coding a zuckerberg'esque program is ravenously depleting my multi-thinking capabilities