a pejorative for members of what is variously called "the
Islamic State of Iraq and Syria" (ISIS), "the
Islamic State of Iraq and the Levant" (ISIL), or "the
Islamic State" (IS). It is based on "Daesh" or D-A-ʿI-SH, its acronym in Arabic (for al-dawla al-islamiya fi al-ʿIraq wa-al-Sham) + "bag", playing on the similar sounds of "daesh" and "douche".