Kapoosh means: You can use it for almost anything. This term was originally used as a nickname for a boy, but is now used in a group friend slang term “screw it” “Whatever” and “Dumbass”. It’s a term used to create our creativity. Simple minds listening to our conversations have no idea what we are talking about even though we may be insulting one another. (in Community Dictionary, added by Yasmine Atkins)