1.NounAlternative form of old skool (“hip-hop or rap music of the late 1970s and 1980s (or more recent music of this style) as contrasted with newer styles of such music”) (alternative spelling of old school).
2.AdjectiveAlternative form of old skool (“of or relating to hip-hop or rap music of the late 1970s and 1980s (or more recent music of this style) as contrasted with newer styles of such music”) (alternative spelling of old school).