The surgical removal of douchebaggery from an infected individual. This procedure is very risky and is typically performed only in emergencies; in severe cases where the douchebaggery has had time to metastasize the operation is often fatal.
"Listen guys, I know it's bad, but it's just too late! If we give him a douchectomy now it's going to kill him: the disease has spread so far that there won't be anything left you can see without a microscope!
Kevin: I don't know, he'd probably say that's 'subjectable'
Chris: How can he? He's a useless twat lip
Kevin: He might not be so bad if he got a doucherectomy
Chris: There's no help for him