Really good, but also really evil. Homer uses it a bunch on The Simpsons. Example: Mmmm, that hedonistic pagan girl is sacrelicious. (drool) OR Getting drunk from communion wine in church because it tastes really good and goes well with the crackers is a perfect example of being sacrelicious.
SACRELICIOUS
Meaning of SACRELICIOUS in English
Slang English vocab. Английский сленговый словарь. 2012