In our book, I called lactose-tolerant people “mampires”, mutants that live off the milk of another species. I think this is a really neat word. But I cannot take credit for it: it was invented by my son Roderick Cochran when he was 11.
He has also invented the word “florsh”, which is what happens when you laugh so hard while drinking that stuff comes out of your nose. Canonically, root beer.