Justin Bieber ... Chick-fil-A Run After Plea Deal -- Would You Like Chicken with Your Anger Management?

Justin Bieber is not allowed to get angry anymore ... but he has no problem getting other people angry ... by cruising into a restaurant that has become synonymous with homophobia ... in a really ugly car we might add.

Justin -- who just copped a plea deal in the egging case by promising to deal with his anger issues by attending classes -- celebrated by going to Chick-fil-A in Hollywood in his custom cheetah print Audi R8.

Everyone thought Justin outgrew the whip a year ago ... that's the last time we spotted it ... get it.

So now we know ... a leopard and an Audi can't change it's spots ... we'll see if Justin can.