Are "knucklehead" and "bonehead" nicknames? Or what this mean?: Other names: Knuckle/Bonehead (by Tadashi) - Big hero 6 Disney Wiki | HiNative
![Miner Mike (Knucklehead's Bowling & Family Entertainment) - Coasterpedia - The Roller Coaster and Flat Ride Wiki Miner Mike (Knucklehead's Bowling & Family Entertainment) - Coasterpedia - The Roller Coaster and Flat Ride Wiki](https://coasterpedia.net/w/images/thumb/9/95/Miner_Mike_%28Knucklehead%27s_Bowling_%26_Family_Entertainment%29_2011_01.jpg/1000px-Miner_Mike_%28Knucklehead%27s_Bowling_%26_Family_Entertainment%29_2011_01.jpg)
Miner Mike (Knucklehead's Bowling & Family Entertainment) - Coasterpedia - The Roller Coaster and Flat Ride Wiki
![File:1941 Harley-Davidson Knucklehead "Chopper" Custom (2013 Racv Motorclassica) (10491974294).jpg - Wikimedia Commons File:1941 Harley-Davidson Knucklehead "Chopper" Custom (2013 Racv Motorclassica) (10491974294).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/a/a9/1941_Harley-Davidson_Knucklehead_%22Chopper%22_Custom_%282013_Racv_Motorclassica%29_%2810491974294%29.jpg)