in (one's) pelt

old-fashioned, literary Nude; without any clothes on. Primarily heard in Ireland. He averted his eyes and shuffled his feet awkwardly when the mistress of the house emerged from the bathtub in her pelt and asked him for a towel. The old cottage had never been fitted with electricity or running water, so we used to bathe in the rain or the nearby stream in our pelts. A: "Why are you blushing like that?" B: "Because I just saw the gardener in his pelt! He must have been changing into dry clothes after the downpour."

in your pelt

naked. Irish informal