A shot that curves sharply to the right for a right-handed golfer is called a slice.
A slice is usually an unintended ball flight caused by sidespin, often produced when the clubface is open relative to the swing path. For a right-handed player, that combination sends the ball from left to right; for a left-handed player, the direction is reversed. Severe slices are sometimes called banana balls because of their pronounced curved flight.
The common mix-up is with a fade. Both shots curve right for a right-handed golfer, but a fade curves only slightly and is often played deliberately by skilled golfers. A draw curves gently from right to left, while a hook is a much sharper right-to-left curve. The clubface and swing path at impact largely determine which flight occurs.