Acronym for "Church of Scientology." Can also be written CO$ since the "religion"'s main goal is to make money.
"The Church of Scientology is a vicious and dangerous cult that masquerades as a religion...It practices a variety of mind-control techniques on people lured into its midst to gain control over their money and their lives. Its aim is to take from them every penny that they have and can ever borrow and to also enslave them to further its wicked ends." -Operation Clambake
"Fuck, the COS took all my money and now I have none."