bare-arse

alternative barearse

1. literallynot comparableWith the buttocks exposed, as for a spanking or a mooning.
2. broadlynot comparableStark naked.

   "You exchanged vows bare-arse naked in front of an archangel?"

   2012, Sandra Hill, Kiss of Pride, HarperCollins, published 2012, →ISBN

   2 more examples

   So he's pounding them off and is away over the hill in sweet dreams, and Clarice tippy-toes into the bedroom as quiet as fog coming off a millpond, and she takes off her clothes and stands there bare-arse looking out the window in the moonlight.

   1969, John Gould, The Jonesport Raffle, and Numerous Other Maine Veracities, Little, Brown and Company, page 25

   "I sleep bare-arse, Mrs. Bayram, always have, which you can come and check out any time you like."

   1990, Daniel Pollock, Lair of the Fox, HarperCollins, published 1990, →ISBN, page 304