It's when someone follows to
get a follow back, followed by an unfollow that leaves the followed unfollowed.
Similar to the American
Football /
Basketball move "juking" - when someone thinks you're going left or right and you move the other way, leaving the pursuer empty handed.
Mike follows Lisa, Lisa follows back - Shortly after, Mike quietly unfollows Lisa, leaving his follower count
one higher and Lisa thinking she has a follower she doesn't.
"Dude, I was just twitter juking and I juked about 300
people... they followed back and I left them high and
dry... "