What is "flaco"

José María Glaría Avizanda (born 24 May 1966), better known as Flaco, is a Spanish football coach and former player. He won the Norwegian Football Cup with Molde in 1994. Flaco has played for Rayo Vallecano from 1986 to 1990, where he was a teammate of Jan Berg. When he left Rayo Vallecano for Molde, he became the first and is still the only Spaniard who has played in the Norwegian Premier League. During his coaching career he has been coaching Averøykameratene and Bryn from Møre og Romsdal. After 17 years in Norway, he now lives in Spain.