Lyric discussion by sokorny 

Cover art for Humble lyrics by Kendrick Lamar

As @kathy lee points out I think it is talking about the vanity of many entertainers (bit of a recurring theme in many of his songs) and sometimes the need to be more humble (more is less).

The references to brands, names etc. I think is used satirical, as is the sexual references and "bitch" tags. Sort of showing up the perception that many entertainers like to present (in videos, their life), but all they have are material goods (no real wealth) ...

My Interpretation