Verb
(idiomatic) To add something extra to something to make it appear more substantial.
Some students pad out their essays by adding a whole lot of quotes from random sources.
Have you heard about girls padding out their bras to make their breasts look bigger?
(idiomatic, slang) To sleep or go to bed.
Because of my job I usually pad out just before nine o'clock.
My housemate was very annoyed to find my friends padded out on the lounge room floor this morning.