Is there such thing as a dead biscuit?

"Dead biscuit" isn't a common culinary term, so there's no official definition. It's likely a playful phrase or a way to describe a biscuit that:

* Is stale: This is the most likely interpretation. Biscuits can become hard and dry after being left out for too long.

* Is overcooked: Overcooked biscuits can be dry and crumbly, also making them "dead."

* Is flavorless: A biscuit might be described as "dead" if it lacks flavor or is bland.

However, it's important to remember that even a stale or overcooked biscuit can be resurrected! There are ways to soften stale biscuits or make them more palatable, like adding butter or dipping them in sauce.

Ultimately, "dead biscuit" is a phrase open to interpretation and likely depends on the context and the speaker's sense of humor.