Green’s Dictionary of Slang

1. (Aus./N.Z.) registration, usu. of a motor vehicle; thus as v., to register.

1967		J. Wynnum I’m Jack, All Right 35: A car doesn’t have to be reggoed in Queensland to have an accident up there .
1967		J. Wynnum I’m a Jack, All Right 39: Everything is sweet except for the bloody reggo sticker.
1973		H. Williams My Love Had a Black Speed Stripe 12: There’s a bit of bull and formfilling about reggo and comprehensive insurance.
1986		R.G. Barrett Godson 65: ‘Top car this. Eight months rego. New tyres’.
1999		Scotty’s Dirt Bike Spares (Aus.) 🌐 [heading] Rego Bloody Rego [...] In Victoria on May 1 1999 a new Recreational Registration category was introduced. We have had heaps of inquiry on this rego at the shop so here are the Facts.
2001		Australasian Ultimate Championships 14 Mar. 🌐 Online rego is now available for team captains and ABC players! Also some more team profiles have been added.
2004		T. Winton ‘Reunion’ in Turning (2005) 211: Oh man, what if they got the rego of the car?
2012		D. Whish-Wilson ‘In Savage Freedom’ in Crime Factory: Hard Labour [ebook] In the glove box I find the rego — a company car.
2019		C. Hammer Silver [ebook] ‘Licence and rego.’ Martin knows Pear will have already checked the registration.
2021		C. Hammer Opal Country 120: ‘You can run the rego of the plane’.

2. attrib. use of sense 1.

1967		J. Wynnum I’m Jack, All Right 39: Everything is sweet except for the bloody silly reggo sticker [AND].
1968		D. Ireland Chantic Bird 164: A heap of reggo plates.