It always amazes me that so many English people are so ignorant of different words used in their country, I feel it is indicative of narrow-mindedness and the priority given to certain "large urban languages" within the media, but mostly narrow-mindedness.
And, yes, I would have known what you were speakng about on this occassion. Or at least have been able to work it out in the context of the conversation had I not, or enquired as to what it was...rather than to feign horror at using a quirkly word, or tried to ridicule it's use, as I feel a lot of people from other English regions would have done.