I am really surprised to see malamanteau on the top of the charts of searched words. There are many sites which are either harmful or not marked safe which feature malamanteau.

Malamanteau word seems to be linked to xkcd cartoon web-comics. The xkcd is supposed to be unique art in which humans and other elements are depicted using the sticks. The theme of these comics is funny mathematical and computer jokes.

But what is so unusual about it? There is sudden jump of number of searches on 12th May 2010. There are many other better cartoon series which does not have so much of coverage.  I read so many things and did not find any element which would spark interest in this at so much large level.

Another guy says portmanteau and the searched keyword is same. It looks like several thousands of the users tried to upload the articles to Wikipedia on 12th May which sparked so much of search volume.

Sounds good and it is ok to see sometimes such activities where the unusual things do happen are noticed. There is none so far who has used this word commercially and or used in mainstream language. It seems to be just being used by the fans of cartoon only.