jargon.artrocity.com
New Hacker's Dictionary the Jargon File v 4.4.6
[a portmanteau of ‘garbage’ and ‘rubbish’; may have originated with SF author Philip K. Dick] Garbage; crap; nonsense. “What is all this gubbish?” The opposite portmanteau ‘rubbage’ is also reported; in fact, it was British slang during the 19th century and appears in Dickens.