have a knees-up

have a knees-up

To have a party, especially one marked by spirited dancing. "Knees-up" comes from "Knees Up Mother Brown," a song associated with the pubs of London's East End in the 20th century. I'm going to have a knees-up this weekend so we can celebrate finally finishing that big project! I'm so exhausted—Josh had a knees-up last night, and I didn't get home till late.

See also: have

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