Typically what people say when they refer to their hometown, when in all reality, every place in the world is nowhere near the best.
Person: Man, I love living in Baltimore! This is the best place on earth
Me: Now we know you are lying.
Usually your hometown, but sometimes not.
San Diego is the BEST place on Earth, ever.
The best place on the face of the muhfuckin Earth.
"This is the best fucking place on Earth."