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jump-up
a point where a road or track rises abruptly from one level to another: We'll never get the truck over this jump-up.
Contributor's comments: I have worked on pastoral properties in the NT and Queensland and this word with the same meaning is in common use in these areas of Australia as well. More specifically I have found it to relate to where a road or track has been cut by a water course of some kind causing a gully with steep sides or where a road or track rises abruptly from low lying level ground.
Contributor's comments: This is also used in Far North Queensland, i.e. near Walkamin on the road from Mareeba to Atherton.
Contributor's comments: Jump-up is a commonly used term for a slight but abrupt rise, often in otherwise flat country in outback South Australia. I suspect it is widely used in outback Australia generally, and perhaps elsewhere in the country as well.
Contributor's comments: Certainly used in western QLD.
Contributor's comments: Is "jump-up" a regionalism or an Australia-wide term for a place where the ground level rises steeply? The area around Tibooburra in north-western NSW is widely known as "the jump-up country".
Contributor's comments: west QLD: geographical feature, a low escarpment or raised area of land, presumably raised by earthquake or similar geological action: "Head on out on the .... road until you get to the jump-up and then it 50 kms on the left"
Contributor's comments: [Darwin informant] Very common way to describe a sharp rise in the road - you often need to go into low range 4x4 to go up the jump up and stay in the same gear when going down the other side of the jump up.
Contributor's comments: "Jump up" is used in the area around Tibooburra as a synonym for "mesa". In the area around Coober Pedy, these are known as "breakaways".
Contributor's comments: Top End NT too, the track to Jim Jim is ok if a bit corrigated till you get to the jump up then it's buggered.