Although previously taken as a way of thinking in the 1800's, especially by people such as Thoreau, the modern way of perceiving the word "transcendental" can be redefined.
Someone is transcendental when he/she is a freaking boss/beast/pro. Someone who transcends is someone who can go beyond even the highest level of skill.
Person 1: "Dude, check out that kid, he's such a beast."
Person 2: "Nah mang, he's better than that. He's transcendental."