The Squidward fad was started by Flar3 Luigi, and heavily enforced by Strong Bad. The fad involved several members such as Spiny, Maiq, Kwobsunit, Slim and Waylon putting Squidward, the famous Spongebob character, in their avatars. Eventually, a group, called the cult of Squidwards was formed, and it was joined like hotcakes. Especially since it smelled like hotcakes. A common running gag among it was mispelling the name 'Squidward', such as 'Skitwad', 'Skudword' and others.
It was originaly a Youtube Poop fad created by CristopherCooler where an image of Squidward was shifted around to the song Gentle Breeze from Trauma Center. Skitwad and Skudword were popular additions to the fad. Original Video