I came across this term when I checked out a fairly new guy who seemed to be answering a few questions and I noticed he had received, over the last few days, big negative numbers taken out of his reputation score with the tag "serial upvoting reversal".
I investigated and found out that it could be because of "unusual activities" surrounding a bunch of upvotes he/she received during a period of a few minutes i.e. it looked fishy; either a cheat, a fan or a stitch-up. I was impressed with the explanation and the tools available to moderators.
But, I suddenly remembered that I had received 5 consecutive upvotes (on non-current questions) a couple of days ago. I checked, and lo and behold, the "fairly new guy" also had a series of rapid-fire upvotes at the same time on the same day.
My 5 upvotes all occured at 10:48 and the new guy's 13 upvotes occured from 10:51 to 10:53.
Could someone look into this please. I don't want this guys votes if he's trying to cover his tracks or someone his trying to create a smokescreen.