Queenslander here and not a term I've noticed myself, bar one commercial on tv that used an animated meerkat, other than that not a big consumer of buying much or booking things online, though I'd understand if I saw it tagged to something where one time pricing event might sprawl ... subscription stuff, nah not happening.
You don't recognize it? Haha oh man, I wonder if: it's invisible to you because you're swimming in the soup, or it's just something people in Sydney say. Or maybe it was tourists from another country that I overheard! Haha sorry to generalize I was only there a few months!