First known and most famously usage is by author Twiggums O'Shea aka: Arletta Sloan aka: Randy Lee Stone, who has written Chronicles of Ordine: Book I: Sacred Beggar Boy; Reggie The Evil Milkshake, and Filthy F'ng Daisies. Butt-release is a term, apparently, made up by this author, to be used in a story. However, from a quote by the author in a small town newspaper, the San Manuel Miner, it appears she attributes it to something said by her youngest daughter, which she then incorporated into her own writing. Now used extensively in Alaska, California, and Arizona, where her work has been sold.
No other known instances of its usage currently known.