The phrase "miscellaneous stuff" refers to a collection of various things that do not fit into any specific category. It is a term used to describe a mixture or assortment of different items. Full definition
This is not going to be about climbing up to the attic or storage space to find the decorations, signs and other miscellaneous stuff from past holiday seasons. (petbusiness.com)
STD Friends will then ask you for miscellaneous stuff like your headline, description and display image. (herpesdatingsites.com)
I have a bunch of miscellaneous stuff in my garage I want to get rid of. (law.stackexchange.com)