some one whom has the characteristics of a douchebag but exibits said charicteristics in such large quantities that the metaphorical "bag" is insufficient
"I may be a douche bag but Kennie's a Sack-o-douche"
The act of being an absolute, over-the-top douchebag, using excessive levels of dickish behavior accompanied by a complete and utter disregard for human decency.
Did you just see that guy cut in line and then start bad-mouthing the barista? The levels of douchestickery are off the charts here!