sesquipedalian: of or referring to inordinately gargantuan vocabulary.
Sesquipedalian means, literally, "a foot and a half long." It's normally used to refer them thar big words, although I see some room for its use in the pornography industry.
"No matter how hard I try, I can get only about 20 pages into
Moby-Dick before the sesquipedalian descriptions send me screaming for some Hemingway."