Several years back, I learned from a free Japanese podcast that referring to something with 'sonnano' or 'annano' is a way of looking down on it / speaking of it as an undesirable thing. There have been times when I've heard these terms used in sentences that sounded like the speaker was talking about something they found distasteful, but other times when it seemed the speaker had no real personal opinion on the subject.
Are these terms used to speak of undesirable things every time they are used? Are there other phrases similar that are used for the same purpose?
Thanks so much in advance for your time and help with my question! *^_^*