There isn't a specific name for the "speed limit" of falling objects. However, the concept you're describing is terminal velocity.

Here's why:

* Terminal velocity is the constant speed that a freely falling object eventually reaches when the force of air resistance equals the force of gravity. At this point, the object stops accelerating and falls at a steady rate.

* It's not a fixed speed limit for all objects, as it depends on factors like the object's shape, mass, and the density of the air.

So, while there's no specific name for the "speed limit," the concept is accurately described as terminal velocity.