Billy Barf and the Vomitones
From Thomas Pynchon's novel Vineland (1990).
They play a mob wedding under the name Gino Baglione and the Paisans. One of their songs is "I'm a Cop."
Isaiah played with a local heavy-metal band called Billy Barf and the Vomitones, who'd been having trouble finding work lately.
See also Eddie Enrico and his Hong Kong Hotshots.