This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A pull strap extending the backstay of a boot or shoe

n. The backbone of a book

n. A loin of meat consisting of the muscle on each side of the spine

"I feel a properly trimmed and cooked venison backstrap is superior to beef steak."

backstab    backstay    backstop    blackstrap