The phrase "crazy shit" is slang that is used to describe something unexpected, unusual, or extreme. It suggests that the situation or action being referred to is surprising or bizarre. Full definition
My point is that we do a lot of crazy shit as new parents. (rookiemoms.com)
Yet as a small - town kid he is also used to being bored, feeling alienated, or «doing crazy shit» (as he put it in a 2014 lecture). (artforum.com)
These registered «touches» can turn pages, add bookmarks and do all kinds of other crazy shit that you'd rather not have in your life. (boingboing.net)