A person who is not "in-the-know" or lacks knowledge about the technical specifications (specs) of any particular electronic device or computer programming.
Wally: Say I just bought that Samsung Blu-ray player for $399, it's the cheapset I've seen so far.
Chuck: Your such a "spec-turd" Wally, that Sammy lacks the latest interactive features and is not technically up to spec. Why do you think it went on sale for? They want to get rid of them.