Green’s Dictionary of Slang

bolshiness n.

[bolshie adj. (2)]

rebelliousness, anti-authoritarianism.

[UK]Economist 14 June 22/2: Trading off bolshiness on these outstanding issues [...] against good behaviour on others will be hard.
[UK]T. Blacker Fixx 215: Civil disobedience, lack of respect for authority and general bloody-minded bolshiness.