A: What did you just say?

B: I asked when you could finish writing the report.

A: Sorry, I’m a bit sleepy today. We had a big knees-up last night. I will give it to you before I leave the office today.

Note: “Knees Up Mother Brown” is a song, published in 1938, by which time it had already been known for some years. The song dates back to at least 1918 and appears to have been sung widely in London on Nov. 11 of that year, Armistice Night, at the end of World War I. The song became popular in English public houses and was particularly associated with Cockney culture. The British slang term “knees-up” came to mean a party or a dance.