Short Answer: You will die.
Explanation: At the equator, the surface of the Earth and everything on it is rotating at 465 meters per second. This speed gradually decreases as you proceed closer to the pole. As soon as Earth stops rotating, everything on the Earth (except at the pole) would continue moving as it had been. The following are the scenarios that will most likely happen.
Your body would fly east at the supersonic speed of 465 meters per second if you’re near the equator.
You can only survive at the poles (for a few seconds).
There will be giant tsunamis, and all water will start moving towards the pole.
Half of the Earth would be completely exposed to the sun, which would raise the temperature, and the other half would freeze.
The speed of the wind will be faster than the shock wave of an atom bomb. It will instantly start fires all around the planet.
The iron core in the Earth’s center would stop too, and thus the protective magnetic field would no longer be there. The radioactive rays from the sun would enter on Earth and kill everything left.
And yes, the most important thing: you would gain weight by 0.3 percent.