Josephine: "Mamma, I have some wack."
Me: "Pardon what?"
Josephine: "Wack. I have wack."
Me: "Wack? I'm not sure what that is?"
Josephine getting exasperated: "Wack!! That stuff in your ears!!! Mamma! WACK!"
....AHA....the singular of WAX.
One wack; much wax. Got it. :-)