The word "bolshie" is an informal term that is often used to describe someone who is very radical or revolutionary in their beliefs and actions. It can be used to refer to someone who strongly supports change, often in a way that challenges the usual or traditional ways of thinking.
While "bolshie" primarily refers to radical or extreme views, it can sometimes be used more generally to describe someone who is difficult or defiant in their behavior.
While "bolshie" does not have specific idioms or phrasal verbs associated with it, it often appears in discussions about social movements, protests, or political activism.
In summary, "bolshie" is a term used to describe someone who holds extreme views, particularly in politics or social movements.