kim poter*Kim Porter is not having it with her former nanny.

The mother of two of Sean “Diddy” Combs‘ children is taking Dawn Drago to court for allegedly lying.

As we reported, the ex-nanny sued Kim for wrongful-firing, claiming that she smoked weed and did cocaine around her own kids.

Kim says that’s not so and the nanny is a liar and a convicted shoplifter.

Porter says what Dawn is really mad about is that she got nixed for lying on her time sheets. So because she’s bitter that she got caught in a lie, she filed a suit.

However, the former baby booty wiper’s lawyer says her shoplifting past has nothing to do with the case “because she was not working at a shop.”

Um, no…