Vacuum cleaner? Why? Here and so clean.
At least that is what Google Translate says this says. The card is of a black cat who seems to have shed quite a bit of fur and is annoyed that presumably her human will be vacuuming. (Cats seem to all hate the dreaded Vacuum!)
Apparently this postcard is one in a series by Russian artist Margarita Zhuravlevoy. For a bit more about her and for photos of the other photos in the series, check out the this link. It is in Russian, but using Google translate you can read it in English (or presumably any other language).