The act of calling out someone's name when they are the perfect distance so that they can hear you but they won't know who did it. This may also be done from a car by yelling "MA'AM' or 'SIR". When and if you get someone good it's quite hilarious. This was started in Keller, Texas.
*Man walking down the street* (you and your bro in your car) "SIR" *man looks around in confusement*
When Spider-Man rubs his wrist using his hand until a white sticky substance is released, often called, "His Webbing". Spidey often uses this "Webbing" as a form of transportation among other things in order to save the day. This is why when Spider-Man isn't horny, the day does not get saved.
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... "