The Earth is, in fact, not really round. It is called an oblate spheroid meaning it’s slightly flattened on the top and bottom poles.

What is the actual definition of a "round" object?

Not questioning you just asking :P

I'm guessing its something like the radius from the center of mass is equal for an infinite number of angles around the object?

An egg is eggshaped but when you slice it I'd call the sliced egg a round object but its defined as a round object as a disk not a sphere.

kim jong un's face

a "round" object is an object where there exists a single unique point that is equidistant from all points that mark the boundary of said object.
Hence the earth does not qualify.. and neither does your spleen:)

WTFBBQSAUCE

This makes me fart

yes... interestingly, because of this the furthest point from the earth's centre is actually the top of Mt Aconcagua in south america because the earth is fatter at the equator, and Everest is not nearly as close to the equator as Aconcagua is...