Squashed Tomato

With a grade 4 girl, we'd been working on an ostinato and writing it on the board.  Later, I was teaching a grade 2 girl.

Girl [giggling]: Squashed tomato...
Me: Ah - what?
Girl [still giggling]: Squashed tomato... okay, os-ti-na-to, but we call them squashed tomatoes.
Me: Oohhh.

And then we made up one of our own.