In the web comic Girl Genius, they use it as a statement to mean "Sieze" somebody.
Center panel, here:
http://www.girlgeniusonline.com/cgi-bin/ggmain.cgi
I cannot deduce from context that it is anything other than a means of indicating a coded message is to follow.
However, I note that the spelling order is slightly different. A different meaning may have been imposed upon it.