Chicago rapper King Louie is credited with coining the term Chiraq in 2009. Louie released a mixtape in 2011 titled
Chiraq, Drillinois.
Drillinois combines
Illinois with
drill, the subgenre of hip-hop that King Louie performs.
The term continued gaining traction through 2013, when Will Robson-Scott released a documentary titled
Chi Raq about violence in Chicago. The following year, another Chicago rapper, Chief Keef, put out an album titled
Chiraq Villain.
https://www.dictionary.com/e/slang/chiraq/