はだし裸足hadashi
1.
The state of being without footwear, where the feet are directly in contact with the ground or surface.
2.
A description of someone who performs exceptionally well, to the point that their skill or talent surpasses even the most seasoned experts, often used in a context that implies undeniable greatness.
Example:
彼はびっくりしてで外に飛び出した。