Drop Down Menu Sub Menus

We have a lot of functions in our App and because of that, we have a lot of Menu items. I have used the drop-down menu to consolidate some of these but I have run out of space across the top and it now wraps itself creating a second menu line. I have a 29" Ultra-wide monitor so I can only imagine how bad it wraps on a laptop or tablet. It would be great if I could create a drop-down menu inside of another drop-down to further consolidate my pages.