Challenging a dojo. I can refer to one or more people who basically like the name suggest storm into a dojo and challenge the people who are there. In the modern age it's becoming more uncommon for these things to happen. Which may be a reason for the sudden prevalence of Mcdojos.
Rick: Did you hear how my boy dojo storming that Mcdojo group Shaolin-Do?
Sam: He won right?
Rick: Of course he won against those bullshit artist.