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knees-up

[ neez-uhp ]
/ ˈnizˌʌp /
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noun British Informal.
a party or lively gathering, usually including dancing.
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Origin of knees-up

By ellipsis from Knees up, Mother Brown a popular dance, originally a song with the same title (1939)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use knees-up in a sentence

British Dictionary definitions for knees-up

knees-up

noun plural knees-ups
a boisterous dance involving the raising of alternate knees
a lively noisy party or celebration, esp one with dancing

Word Origin for knees-up

C20: from the song "Knees up Mother Brown" to which the dance is performed
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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