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Related to jumped-up: jumped ship
informal suddenly risen in significance, esp when appearing arrogant
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|Adj.||1.||jumped-up - (British informal) upstart|
colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
Britain, Great Britain, U.K., UK, United Kingdom, United Kingdom of Great Britain and Northern Ireland - a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom
pretentious - making claim to or creating an appearance of (often undeserved) importance or distinction; "a pretentious country house"; "a pretentious fraud"; "a pretentious scholarly edition"