An incomplete Glossary of Australasian and obscure terms:
Billabong: A waterhole that dries up during the dry season.
Billy: A kettle used for camp cooking, especially to boil water for tea.
Box: When referring to plants, it can be any of a number of trees and shrubs, especially those of genus Buxus or genus Eucalyptus.
Cocky/cockatoo: A small-time farmer.
Coolabah: (more often Coolibah) Eucalyptus microtheca. The leaves of the Eucalyptus hang sideways, with the narrow edge to the sun, as an adaptation to drought. Hence they are famous for not providing shade.
Edward Rex: (Rex = King) Edward VII, 1841-1910, King of the United Kingdom (and therefore nominal head of state in Australia) from 1901 to 1910.
Fi. fa.: fieri facias—a legal paper authorising the seizure of a debtor's goods.
Flash: Ostentatious; fake; (obsolete) relating to shady characters.
Gully-raker: A person who musters unbranded cattle (or horses).
Humpy: (Aboriginal) A rough or temporary hut or shelter in the bush, especially one built from bark, branches, and the like. A gunyah, wurley, or mia-mia.
Jumbuck: A sheep.
Korero: (Maori) a discussion, meeting, etc.
Leichhardt, Ludwig [1813-1848?]: Prussian-born Australian explorer, his last expedition (in 1848) never returned.
Matilda: A swag. See “Waltz Matilda”.
Mob: When referring to animals, a group or herd.
Myall: An Aborigine living according to tradition; wild; any of several types of wattle trees (genus Acacia).
Native bear: A koala.
Overland: (Historical) A route by land, especially for driving stock, and especially a route from New South Wales to South Australia; to drive stock by land, especially on this route.
Overlander: One who travels or drives stock overland.
Paddy-melon/paddymelon/pademelon: One of several species of wallabies, of the genus Thylogalefound.
Pah/Pa: A Maori village.
Pannikin: A small pan; also (colloquial), self-important.
Push: Any group of people sharing something in common; a gang.
Rangatira: (Maori) a lord, chief, boss, etc.
Ringer: When speaking of shearing sheep, the fastest shearer in the group.
Saltbush: Any of a number species of the family Chenopodiaceae, especially of genus Atriplex and of genus Rhagodia, the latter of which is limited to Australia and New Zealand. Used as a grazing crop, saltbush can grow in arid, saline, or alkaline conditions; the region where saltbush grows.
Selector: A free selector, a farmer who selected and settled land by lease or license from the government.
Shout: To buy a round of drinks.
Squatter: A person who first settled on land without government permission, and later continued by lease or license, generally to raise stock; a wealthy rural landowner.
Station: A farm or ranch, especially one devoted to cattle or sheep.
Sturt, Charles [1795-1869]: Indian-born Australian explorer, explored eastern Australia, his explorations led to the discovery of the river system in southeastern Australia.
Sundowner: (Historical) A swagman who arrives at a place too late for work, but looking for food and/or shelter.
Swag: A bundle or roll of bedding and other personal items.
Swagman: A man who travels from place to place looking for work, e.g. carrying a swag.
Tucker: Food.
Wallaby: One of a number of marsupial species of the genus Wallabia, etc., related to the kangaroo, but smaller; (colloquial) “on the wallaby (track)”, on the move, on the road.
Waltz Matilda: To wander with a swag. “Waltz”, to travel in circles.
Warrigal: Originally the dingo, or native dog of Australia; by association, anything wild; brumbies (wild horses).
Water-bag/waterbag: A bag for carrying water, usually canvas.
Wattle: Any of a number of shrubs or trees of the genus Acacia, having off-white or yellow flowers. So named because the branches were used to weave wattle, a type of construction made of interwoven branches and the like.
Wombat: Any of several species of burrowing marsupials, family Vombatidae, which vaguely resemble small bears; (colloquial) an ignorant person.
Yarran: A small tree, Acacia homalophylla, also the bastard myall, A. glaucescens.