He is Mo'rrisroe's minion.
Jero'me will occasionally say:
- Spare some change for a starving artist?
- Hey, you there. Want some candy?
- What up son! Wait, is anyone there?
Brian Morrisroe is the Lead Interior Artist for Blizzard, and his employee Jeremy Graves is a Dungeon / City Artist. The reason for the rhymes is due to Jeremy having a knack for karaoke rapping to the beats of popular rappers such as Snoop Dogg, Dr. Dre, and Eminem. This is the reason for the bottle in his hand and his spontaneously collapsing to the ground. The NPC also randomly says "BIP", evidently due to the fact Jeremy is known to do this himself.