Wilkoism 

To make a foolish mistake. Commonly a idiotic mistake made when not paying attention and talking too much.

Oh man i just rebooted the wrong server, what a wilkoism.

Wilkoism by Ops team December 15, 2008

willoism

The act of spamming peoples Facebook news feeds with annoying and desperate self-promotion in order to attempt to restore ego.

Oh, true, i better ease up a bit then.

willoism by Anon2353575343 July 2, 2011