Green’s Dictionary of Slang

(Aus.) the annual Exhibition held at the Brisbane Exhibition Grounds.

1979		Courier-Mail (Brisbane) 31 July 22: How to see the Ekka – and survive [heading] An expected 810,000 people will forge optimistically through the Brisbane Exhibition turnstiles this year [GAW4].
1980		Sun. Mail (Brisbane) 17 Aug. 3: Maternity hospitals in Brisbane report an upsurge in premature births during the annual Ekka. It appears that the Super Loops, Pirate Ship and other similar thrill-seeking sideshows induced quite a few births [GAW4].
1993		T. Maniaty All Over the Shop 48: It’s really the Exhibition of the Queensland Royal National Association, but this imperial mouthful [...] is reduced to the ‘Ekka’.
2002		www.ekka.com.au 🌐 The Royal Queensland Show or ‘Ekka’ as it is now affectionately referred to by Queenslanders, is the largest annual event in Queensland continually attracting more than 600 000 visitors each year.