The story
From Daesh + Khorasan. From being the Daesh affiliate in the Greater Khorasan.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: An Islamic terrorist group located in Pakistan and Afghanistan affiliated with Daesh (“IS, ISIL, ISIS”) Full definition →
From Daesh + Khorasan. From being the Daesh affiliate in the Greater Khorasan.
Etymology from Wiktionary, CC BY-SA 4.0.