jack-upEnglishOxford Dictionary of Englishjack-up ▸ noun 1 (also jack-up rig) an offshore drilling rig the legs of which are lowered to the seabed from the operating platform: the company describes itself as a leading contractor of jack-up rigs jack-ups capable of drilling in water depths ranging between 30 and 300 feet. 2 New Zealand English informal a dishonest or underhand practice or arrangement: I wouldn't be at all surprised if the whole thing was a jack-up.
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