Fiberglass. When at the appropriate thickness, fiberglass can easily deflect bullets by absorbing the energy through its layers. When placed between steel plates, this ultra-lightweight material effectively distorts the rounds and delaminates to capture the bullets within the structure.

Can a frying pan deflect a bullet?

It can easily block shotgun blasts. A frying pan is also claimed to block bullets while in the land, and from both the sides. This way, you can possibly minimise severe damage caused by bullets to a significant extent, and at the same time, survive longer.

Can a human deflect a bullet?

Deflecting a bullet would involve slowing it down to speeds such that the bullet is not destroyed, and then re-accelerating it in the other direction, something simple rigid materials cannot accomplish. Sword can be easily made to be resistant enough, at least for small calibre rounds.