So I propose that the editors of the Oxford English Dictionary add this phrase to their most excellent tome:

To Islam One's Way Out of Marriage

1. a. idiom. Of a person, esp. a Muslim male, to kill (one's wife), usually by beheading and then hiding the body, instead of legally divorcing her. In non-Muslim countries, it is considered murder.
c2009 Red Alerts, because she had a dark complexion he wasn’t happy with her and decided to Islam his way out of the marriage.

Caption to photo:The Ashura ceremony takes place during Muharram, the first month of the Islamic calendar, and commemorates the death of Husayn, who is celebrated as the grandson of the Prophet Muhammad and a central figure in the Shia faith. The faithful flagellate themselves with a bladed instrument. Not all Muslims are crazy enough to bloody themselves like this, instead they pick on Christians and Jews to decapitate and torture.