Laughing Buddhas are the best! I have a few of them too, but the wooden ones. I found a stone just like that on the beach, couldn’t for the life of me figure out what made that strange hole. I wonder where it is, I haven’t seen it lying around here at home for a while. Probably shoved in a forgotten corner somewhere. I’ll find it and post it. It's called a hag stone?
When I find my hag stone, I'll post a photo - I think it looks like yours, with the hole in the top corner.