The Oed definition of glorious is:
Knowing that Blu’s stepfather is a pastor, we can assume that he was very exposed to Christianity and the bible, throughout which God is often associated with glory. With this, and the last line of the song, we know that Blu means this in a boastful, yet spiritual way.
Also, the spelling of the song GloryUs should be recognized as suggesting that we are all glorious in one way or another.
To help improve the meaning of these lyrics, visit “GloryUs” by Blu Lyrics and leave a comment on the lyrics box