In "The Kiss Seen Around the World", Peter finds a self-playing piano at the dollar store and sets the song to a beautiful Mozart tune and pretends he's actually playing it as a joke. Holden Caulfield comes up and admires Peter's musical talent, but when Peter shows him that he was actually faking it, Holden gets mad and starts screaming like a ninny, repeatedly calling him a "phony".
When The Griffins leave the store, they find Holden, vandalizing their car, spray painting "Phony" on the side of it.
At the end of the episode, Holden shows up one last time, standing outside of The Griffin House, screaming at random pedestrians, to say that a big fat phony lives there.
In "Love is in the Air", the toxic chemicals that caused people to love each other finally clear up and Holden is shown to be with a girl. When Holden is restored back to normal, he realizes his love was fake and calls his girlfriend a phony. The girl tries to get Holden to keep loving him by showing him her tits but Holden notices they're implants and again, calls her a phony, before dumping her and leaving.
In "The Story On Page One", Holden gets mad at the news about Luke Perry being gay and calls it out for being fake, saying that whoever wrote that is a big fat phony. A teacher comes in and asks him what he's doing in a high school if he's a full grown adult and threatens to call the cops if he doesn't leave. Holden yells at the so-called teacher, pointing out that he doesn't really work there.
In "When You Wish Upon a Weinstein", when it's revealed that The Griffins aren't actually Jewish, Holden stands up and calls them out on being gentile phonies.