Me gusta el baloncesto, pero no soy tan fanático como el resto que hay en las gradas.I like basketball, but I'm not as fanatical as the other people in the stands.
This means that the noun can be masculine or feminine, depending on the gender of person it refers to (e.g. el doctor, la doctora).
¡Mi prima es una fanática de los Beatles! Compra y colecciona todo lo que esté relacionado con la banda.My cousin is mad about The Beatles! She buys and collects everything that's related to them.
4.(sports)
Regionalism used in Latin America: all the countries in South America, Central America, and the Caribbean. Does not include Spain.
Suárez firmó autógrafos y se sacó fotos con los fanáticos que esperaban afuera del estadio.Suarez signed autographs and took pictures with the fans who waited outside the stadium.