Respect I used to never get
Cause all I got was upset
When niggas used to be like
(What's, up fool!? Nigga what's up?)

from The Pharcyde – Runnin' Lyrics on Rap Genius

Meaning

In the game you need respect, but Fat Lip wasn’t getting any because he would get upset when others greeted him disrespectfully.

Could also imply that he would get upset at even the slightest perceived provocation, and take it personally.

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