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!!!
satan sakes
It's an alternative for god's sake, but used by more satanic people and or people trying to get others attention whom are religious.
For example "Gosh John, why did you not go to the church of theistic satanism last night for Satan Sakes?"