To take a combination of Xanax and Ketamine recreationally, in reference to the Thai cave rescue of the 12 boys who were trapped in a cave by rising flood waters.
Dude you wanna cave out tonight? Totally! You can drag me around the apartment and I won't give a fuuuuck.
When you don't have to work or have any appointments or obligations and you don't want to leave your house or talk to anybody or do anything on your list of things you should do, as though you were hidden away in a cave.
The act of having a bowel movement. The idea being that the anus is synonymous with a dark cave, and the fecal matter being brown, is synonymous with a bear.