It means "full up [with food]". The image is of a fish prepared whole for cooking, with stuffing in its belly.
This is what I meant with "Stuffed to the Gills."
This is from the front seat of the SUV during our recent trip back to Mexico.
This is a personal blog where I will be writing about family, photography, cooking, gardening, living in San Miguel de Allende, Mexico and growing older. And maybe anything else that happens to interest me. You've been warned...but feel free to read along.