You got it! In Episode 1 of Season Three, the FBI agents were listening to a wiretap of Big Pussy trying to get Tony to say something incriminating about the murder of Matthew Bevilaqua. All Tony said was, "That Matthew was never any good," much to the agents' disappointment.

The answer to yours is Ralphie Cifaretto, speaking to Georgie the Bing bartender about Georgie not having seen "Gladiator".

New Q: "It died on the vine."