v.1. To line or stuff something with soft material to make it fuller, puffier, or fluffier: I padded the pillow out with extra down. If you don't like the shape of this coat, we can pad out the shoulders for a fuller look.
2. To lengthen or increase something, especially with something extraneous: The director padded out the movie with several extra scenes so that it would be 90 minutes long. The lazy student wrote a short report and padded it out with useless facts.