What is tempera on gesso pitch and mastic?

Oh, dude, tempera on gesso pitch and mastic is basically just a fancy way of saying painting with egg yolk mixed with pigment on a surface prepared with gesso, resin, and tree sap. It's like the ancient version of paint and primer, but with a little extra pizzazz. So, if you ever feel like getting artsy like the old masters, now you know what to ask for at the art store!