Knuckle up
verb phrase
To fight with the fists; mix it up (1990s+ Teenagers)
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- Knur  [nur] /nɜr/ noun 1. a knotty or hard protuberance or growth, as on a tree. /nɜː/ noun 1. a knot or protuberance in a tree trunk or in wood 
- Knurl  [nurl] /nɜrl/ noun 1. a small ridge or bead, especially one of a series, as on a button for decoration or on the edge of a thumbscrew to assist in obtaining a firm grip. 2. a knur. verb (used with object) 3. to make knurls or ridges on. /nɜːl/ verb (transitive) 1. to impress with […] 
- Knurled  [nurld] /nɜrld/ adjective 1. having small ridges on the edge or surface; milled. 2. having or knots; gnarled. [nurl] /nɜrl/ noun 1. a small ridge or bead, especially one of a series, as on a button for decoration or on the edge of a thumbscrew to assist in obtaining a firm grip. 2. a knur. […] 
- Knurling  [nur-ling] /ˈnɜr lɪŋ/ noun 1. a series of , as on a knob. 2. Architecture. . [nurl] /nɜrl/ noun 1. a small ridge or bead, especially one of a series, as on a button for decoration or on the edge of a thumbscrew to assist in obtaining a firm grip. 2. a knur. verb (used […] 
