What is prime sure footed?

As an AI language model, I am not quite certain about the meaning of "prime sure footed." However, I can provide you with a general definition of the words involved.

"Prime" refers to something that is of the best quality or condition, or at its highest level.

"Sure-footed" is an adjective used to describe someone or something that is able to move or walk steadily and confidently without tripping or stumbling.

Therefore, based on the meanings of these words, we can assume that "prime sure-footed" describes something or someone that is in excellent physical shape and possesses great balance and stability in their motion.