It is a word of English, which means " cameo ". Used in film and theatre, formerly when a famous or known character appeared in a work just for show, as promotion, and generally without participation in dialogues ( for example, as part of a crowd ) Hence the comparison with cameos, where a human effigy is displayed in the middle of the artistic pendant. In the film the cameos by famous already began to be for minor characters or stories parallel to the main storyline.