Can you be so fat that it will stop a bullet?

Answer 1

If the said bullet was being shot at you from a projectile triggered weapon, aka a gun, then no, no amount of fat will shield you from a bullet travelling at a hightened speed via it's projection and fire based propellent as a gun.

Yet if someone threw a bullet at you, or more preferably, your stomach, the misplacement of firepower and speed will render the bullet pointless, thus not peircing your skin, i.e. 'hitting' you in terms of a gun.

So if your going to imitate the matrix whilst carrying an extra bit of weight round the middle, then make sure your cardboard cutouts of the agents don't use guns.