For Satan 

To do something because you have to.

Person1: Let's drink beer!
Person2: Well ok, for Satan.

For Satan by Pour Satane May 30, 2008

for Satan's sake 

Has a very similar definition to the phrase for Christ's sake!, but the devil is referenced instead of Jesus.

For Satan's sake, drink up or we'll be late for the next party!!!

for Satan's sake by Telephony September 25, 2013

Campus crusade for satan 

An organization that tries to convert collage students to satanism. Modled on campus crusade for christ. started by a satanist who thought it unfair that christianity was being promoted on campuses and not his religion.

John is part of campus crusade for satan.

Campus crusade for satan by Deep blue 2012 October 30, 2009