| knees-up | |
| —n , pl knees-ups | |
| 1. | a boisterous dance involving the raising of alternate knees |
| 2. | a lively noisy party or celebration, esp one with dancing |
| [C20: from the song "Knees up Mother Brown" to which the dance is performed] | |
| a scrap or morsel of food left at a meal. |
| a fool or simpleton; ninny. |