For a very long time I believed the urban legend that Pearl Jam meant…a certain fluid with the consistency of jam that was pearl in color, and somewhere along the line the urban legend evolved to "Pearl Jam" being a Naked Lunch reference. It made for an interesting bit of trivia that Pearl Jam and Steely Dan got their names the same way.
Vedder says that’s not what the name means, and I’ve never read Naked Lunch (I think I saw the Cronenberg movie at some point) so I’m not sure if "Pearl Jam" is even in there.