A phrase derived from famous occultist Aleister Crowley's name to describe something powerful, indulgent, alternative and awesome such as music, clothing and idea's etc. It may also be used to describe a lifestyle or a certain human belief, but never should be used to describe a common ideal (I.E Christianity or other similar religions) or be used when discussing someone with no interest in Aleister Crowley.
That guy over there is definitely Crowleyrific.