My neighbor spends every day in his garden (though he works full time). It is called "chayote" or some people know it as "choko". He is from Jamaica and says that if you cook it with meat, it takes on that flavor.
I have always called these chokos until I came to Canada where they call them chayote squash. We use them often in place of potatoes. Geat capture and I love the bright colour.