Did anybody in the UK actually use the word "def"? I've only ever heard it on the early Fresh Prince episodes.
"Def" was apparently urban slang for good. A bit like "wicked". Never heard it outside the confines of the "Def II" strand - but I grew up in a sleepy backwater on the south coast...
Suspect it was an urban thing heard by Janet Street-Porter who latched onto it?
Some of the programme strands were quite good - particularly the "Rough Guides", though some were a bit "style over substance". I remember Reportage being pretty hit or miss. A lot of the production and presentation team had worked with JSP on Network 7 I think.
No - I'm pretty certain that the creation of DEF II, and the department that ran it under Janet Street-Porter, was a response to No Limits and the perceived "naffness" of similar programmes aimed at the youth audience.
I'm sure I've heard either Janet Street Porter or Normski say that they got the DEF name from the DEF button from JSP Mercedes Benz, daft as it sounds.