pickknuckle down . knuckle down See: BUCKLE DOWN. No categories: add yours Source: A Dictionary of American Idioms 'knuckle down' on video Knuckle Down (2001 Remaster) ONE-MINUTE ENGLISH: knuckle down LEARN WITH LEXICAL LAB Ani di Franco - Knuckle Down Sonic the Hedgehog 2 (2022) - "Knuckle Down Featurette" - Paramount Pictures sort: relevance, mode: exact match, q: "knuckle down", maxResults: 4, videoEmbeddable: true, videoSyndicated: true, safeSearch: strict, type: video Subscribe to: American IdiomsEnglish Slang Discuss