Comes from [link|http://www.theregister.co.uk/2002/07/04/why_microsoft_makes_a_complete/|This Register article] where the pronounciations of the "#" are discussed. You'll find my favorite option in the section on "slang usage".

I proposed this as the "official" name for this almost language [link|http://z.iwethey.org/forums/render/content/show?contentid=44734|here]