What you need: a button-up, a paint palette, and some artistic talent
This one might require slightly more effort than some other costumes on this list, but the reward is higher and it’s still easy to put together at the very last minute. It’s also a great costume to pull off with a friend or a significant other who is just as lazy as you. First, decide who will be Bob Ross and who will be his happy little tree. Bob Ross just needs a button up shirt, jeans, a makeshift paint palette, and big afro-like hair. The happy little tree can be dictated by how much time you have. The easiest way is to dress up in all brown and stick literal leaves on you (either ones that you found or drew/printed out).