Faldage- I believe your definition of junk food is also the definition of Monosodium Glutamate. wink

Jenny- 'idious' would work... although it's too reminiscent of 'idiocy' for my comfort. :P

Thanks, all, for you kind suggestions, but I'm afriad it's still escaping me. I've been reading a lot of Nick Hornby recently, and I'm thinking it must have come from there... it seems like a concept his characters would apply, no? I'll find it eventually.