The word occasionally pops up in French band names and the like, and is Russian slang for writing Russian using Latin letters as if they were Cyrillic (similar to l337 speak). Also used in Esperanto for the same effect as "It's all greek to me!".
"I can write russian using BO/\RTTI-OK (ru: volyapyuk/воляпюк) encoding" (Russian l337 speaker)
"That French band Volapuk is pretty awesome eh?" (International music lover commenting on own tastes)
"Crazy volapükists, did they seriously think they could steal the final victory from us?" (Esperantist from the days when everyone in Europe had a revolution or three up their sleeves)