What is "escoria"

José Ibarra is a Mexican Luchador ( wrestler) who is best known as Escoria / Dark Escoria ( Spanish for "Dreg"), a face character that works for Asistencia Asesoría y Administración (AAA). Ibarra has been part of The Black Family since it was formed, but left the stable in October 2010. During his time in the Black Family, Escoria was also a member of Lucha Libre Latina (LLL) and La Secta del Mesias, its predecessor La Secta Cibernetica and La Legión Extranjera.