Joanna Krupa -- Downward Dog Sex Joke ... Thanks Russell Westbrook's Driver!!! (VIDEO)

Joanna Krupa asked for it and she got it ... a joke about a dog going south on its female owner -- and the bearer was none other than the driver for Oklahoma City Thunder's star Russell Westbrook.

It seems Joanna knew the driver was locked and loaded with a joke Saturday night when she walked out of Craig's in WeHo, but it turned out to be super creepy.