The suffix "-azo" added to the end of the word gasolina (gasoline) conveys the act of a "strike or blow," and reflects the feeling that the raise in prices is a blow to the cost of living.
El sufijo "-azo" añadido al final de la palabra gasolina transmite el acto de un "golpe," y refleja el sentimiento de que la subida de los precios es un golpe al coste de vida.