It's the start of the Monogatari series, each of which has a title which is a portmanteau with monogatari - for example, the second part of the first season is "Nisemonogatari", from nisemono = fake, forgery, imposter (although given that the "fakes" are more imposters than forgeries, the "mono" kanji should probably be the one for a person rather than an object). Although some of the words are made up, I think.
That said, Bakemonogatari is awesome and bizarre and different, and most of the time even the fan service seems to be done in a weird self-aware manner (although that gets a little worse in Nisemonogatari ... *shudder* I will never think of brushing my teeth the same way).