Great plenty?

Jesse says this thing sometimes that always leaves me bewildered and disoriented.

He says "great plenty".

As in "Don't get any meat at the store, we have great plenty in the freezer already." or "We don't need to get quarters for the garage sale, I've already got great plenty."

Every time he says it I want to respond with "Whatever you say Tonto!" but that seems kind of racist so I don't.

So. Great plenty. Is that a real expression or is it just some crazy thing Jesse made up?

One year ago today I added another chapter in Joseph's adoption story and I was naive.
Two years ago today I didn't want people touching me.
Three years ago today my kids were cute and Elle was bald.