Namasté [1] is a greeting commonly used by Hindus, Sikhs, and Buddhists in the Indian subcontinent to express deep respect. In yoga, you say it with a slight bow and palms together to mean "I am your humble servant." For this smartass, it's scrawled onto the rear end of a dirty car to say "up yours" to total strangers. Hey, language has to evolve, right?

Source [2]