Bumble-Bee: Yellow and black Tranz Rail livery. Introduced on DC 4323 in 2001 after the Makihi collision, and officially named 'Hi-Viz'. Originally all locos were to have the Tranz Rail winged logo, but most carried 'TR' block letters on the long hood and several locos did not carry any branding (No Name).
Carvan: Passenger carriage with a guard's compartment at one end, classes AF (wooden body) and AL (steel body). Originally built to relieve a shortage of guard's vans and used on rural branch lines in place of a separate carriage and guard's van, the later AL carvans were used in suburban service only.
Cato Blue: New Zealand Rail/Tranz Rail blue, yellow and grey livery used from 1990 to 2001. Originally NZ Rail used a darker blue, which was changed to a lighter tone by Tranz Rail.
Clockwork Orange: 1970s orange and yellow livery; used on DX class (also known as "Tropical" or "Popsicle").
Coalies: Coal train, particularly from Rapahoe and Ngakawau on the West Coast to Lyttelton. Also Genesis Energy coal trains between Mount Manganui and Weavers Crossing (these trains ceased running in 2012), but not for coal trains on the Rotowaro Industrial Branch.
Corn-cob:Toll Rail yellow and aquamarine livery. First applied to DX 5379 for the launch of Toll Rail at Southdown in 2004; the last locomotive was to have been DXB 5143 but this unit was never painted in the complete livery.
Flying Tomato: A simplified version of the Fruit Salad livery, with the grey replaced with red. Applied to members of the DC, DF, DSC, and TR class locomotives in the 1980s as a cheaper alternative to the full Fruit Salad livery.
Fruit Salad:NZR red and grey livery with yellow highlights, also known as International Orange.
Foamer: A railfan, particularly one whose enthusiasm appears excessive.
Grass Grubs:88 seater railcars converted to carriages for locomotive haulage, from their green livery.
Gull Roost: the Onerahi Branch's 323-metre-long bridge across the harbour in Whangarei, because of the large number of gulls that roosted there. The branch closed in 1933 and the bridge no longer exists.
Kingston Flyer: Heritage passenger train instituted in 1972 using steam locomotives AB 778 and AB 795, originally between Lumsden and Kingston and later truncated to the 14 km between Fairlight and Kingston.
Longest xylophone in the world: former road/rail bridge on the now-closed portion of the Ross Branch south of Hokitika, named for the loud rattling its planks made.
Lowsiders: The M, MA, MB, MC, and MCC wagons, so called for their low sides. These wagons had lower sides than the L-series 'highsider' wagons, and were often used for loads that could not fit into a highsider or did not warrant the use of one.
Lokey: locomotive on a bush tramway. Abbreviation of the term 'locomotive', but shortened by bush workers and adopted by railway enthusiasts.
Matangi: FT/FT class electric multiple unit used on the Wellington suburban network, chosen in 2008 in a public competition run by the Greater Wellington Regional Council, and comes from the Māori word matangi, meaning wind or breeze (in reference to Wellington's windy reputation).
Red Terror: A Leyland Cub car converted to run on rails for inspection use by the Railways Department General Manager Garnet Hercules Mackley in 1933. It was converted for uses associated with electrified lines in 1941, and after spending a few years in the Hutt Valley, it was transferred to Otira and remained there until the Otira Tunnel was de-electrified in 1997. It is now owned by the Ferrymead Railway.
Roadsiders: The Z class bogie vans, so called as they could be unloaded (supposedly) onto the roadside. Often used for parcels traffic, especially by Railfreight, and as luggage vans on express passenger trains, for which they were fitted with x-25330 'Timken' bogies to run at 80 km/h.
Tropical: 1970s orange and yellow livery; used on the DX class (also known as "Clockwork Orange" or "Popsicle").
The Twins:DBR class Wellington-based locomotives 1200 and 1267, commonly paired for purposes such as banking south of Paekakariki. Because of this nickname, paired DBRs in Auckland are occasionally referred to as "non-identical twins", depending on their liveries.