It’s a long list of items, typically used as a comment in regards to someone asking for many things (e.g., “he’s got a laundry list of things he wants fixed on his car”). And where might it have come from? Well, from something like this:
Back in the day when men wore “hose”, not “socks”, and “underdrawers”. Bras were still “under-vests”, I think. Fascinating.