Hey you! Yes, you! Thank you for adding beauty to the world!
Definitions of yah:
adverb: (UK, India, South Africa, Australia, New Zealand) Yes.
noun: (Britain, informal) An upper-class person, especially a Sloane Ranger.
noun: Alternative form of Jah [(religion) A shortened form of Yahweh or Jehovah, God's personal name in the Bible. Often appearing as part of Biblical names as "-iah", or "Jeho-" as in Isaiah, Jeremiah, Jehoshua, and Jehosaphat, and Hebrew words like הַלְּלוּיָהּ (“hallelujah”).]