This is the 13702nd most frequent Spanish word.
rockero
A "rockero" is a person involved in or a fan of rock music, often associated with the rock culture or lifestyle.
Here, 'rockero' is used as a noun, referring to individuals who enjoy rock music and participate in its culture.
Los rockeros suelen asistir a festivales musicales.
Rock enthusiasts usually attend music festivals.
In this case, 'rockero' acts as an adjective, qualifying 'guitarrista' to specify the genre of music he is associated with.
Él es un guitarrista rockero muy talentoso.
He is a very talented rock guitarist.
In this sentence, 'rockera' functions as an adjective, describing the attitude as being associated with rock culture.