In Australia 'duds' is an uncommonly used term for clothes, "I've been dudded" is moderately common and means to lose something through trickery or being 'ripped off'. Perhaps this really means that you've 'de-dudded' as was once the infamous experience of an august Australian Prime Minister - a bit like the victim's experience in Black Velvet Band and many similar songs.

I don't own a Macquarie Dictionary, but I would expect that 'dudded' would be in there.

Regards, John