- 1
A knees-up is a loud, cheerful party — singing, dancing, drink, and a bit of mess. It is British, informal, and a little old-fashioned, though people still say it with a smile. It comes from a music-hall song, 'Knees Up Mother Brown' (sung from at least 1918; published in 1938), which had dancers lifting their knees. So it is not a stretch class, and it is not a medical word. Americans generally do not use it this way. Think pub, wedding, street party — not a quiet dinner.
熱鬧派對（英式）
組成Does not really split as a meaning. UK, 20th century: from the song 'Knees Up Mother Brown', suggesting the motions of dancing.
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
knees-upnoun
- 1
informalA party.
- Let's have a bit of a knees-up, Arp.
- However, having heard all the mutinous chants Taxpayer FC’s fans sang about Gollivan at Vicarage Road, Moyes has realised it’s probably part of his remit to spread some love and urge everyone in east London to have a good old Cockney knees-up before Friday’s visit from Leicester City.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。