Watcha Got? (Lay it down on me?)

"There are tons of Metallica tributes, Creed tributes, '80's hair metal cover bands, and what have you."

This is a quote from my last post. As I was reading over it, I just had to wonder "What the heck does 'what have you' mean, anyway?" Lots of people use that term (it seems especially popular among older people, along with "Take it easy now," "When I was your age…," and "Dadgummit") but I don't know if anyone has any idea what it means.