BMW

Black man's weiner, big mexican woman, or bavarian motor works.

Ex. (A)
Johnny Racist: Go suck a BMW!
Toolbag Friend of Johnny's: Ha ha!
Ex. (B)
Johnny Racist: Is that an earthquake, or just a BMW walking by?
Bystander: DOUCHEBAG!
Ex. (C)
Gearhead: Hey, look a BMW M5 with a type 4 body kit and chrome spinners!
Bystander: Nice car.