They ekekekek if they want to hunt or to grab your attention / attention of other cats for the hunt. I run around with a bug zapper paddle and hunt with my cat. I see a moth, I ekekek at him and he comes in running, grabs the thing and eats it. Sometimes he ekekeks at me and I grab the paddle and launch a serve at a fly. Gets him off my back for playtime, since playtime is basically simulating a hunt, and he goes to eat and sleep shortly after.