pickknees up . knees up {n.} A lively party or dance. Categories: add yours British noun Source: British slang (Wikipedia) 'knees up' on video Knees Up Knees Up - LWT 1984 Obskϋr - Knees Up Knees Up Mother Brown (Cockney Classic) sort: relevance, mode: exact match, q: "knees up", maxResults: 4, videoEmbeddable: true, videoSyndicated: true, safeSearch: strict, type: video Subscribe to: British SlangSlangEnglish Slang Comment on this entry