Baja panties means: A car, usually an American muscle car such as a Mustang or Camaro, that has great sex appeal. The term comes from Latin America. It is Spanish-English mashup. The term means “panties down”, which is a reference to the fact that girls eventually will take off their clothes once they are in the car. Although it is used in Panama, the term does not appear to be common in Mexico. The term is used in many songs and web references. The American equivalent would be Pussy Magnet. (in Community Dictionary, added by Balduino Muñoz)