PROPER NOUN: (The most stylish person you know approaches) "What up Steezus Christ!?!"
ADJECTIVE: (Someone creates/executes variable "x") "OMG, steezus christ!" or "That was steezus christ!"
CANNOT EVER be used as an ADVERB due to the nature of the word, which necessitates the highest order of that which it is reference to. Example:
"That trick was steezus christ gnarly."
As you can see -- "steezus christ" in the above example pwns gnarly thereby making it irrelevant and nonsensical to use.
An acceptable adverb for the above example would be "super" or "really". In fact, one might convert "gnarly" to "gnar-balls" if they were so inclined or felt strongly enough about the matter.