combination of 'splendor' and 'terrific', thus being an adjective for something that is simultaneously 'spendlorful' (or 'splendid') and 'terrific'. Common usage occurs in motivational literature such as horrorscopes and blogs.
"March 13: Venus is in the third ascenscion so that means today will be quite splendorific for all you Leons!"
When writing a paper, it is the point when you break through all writing barriers and words begin to flow through your mind and onto paper. At this point, writing your paper becomes very easy and the end of the document seems to approach rapidly.