truculence

defiant aggressiveness

When the boss confronted Aaron about his earlier remarks, Aaron responded with utter truculence, simply throwing a glass of water in the boss' face and walking away.

Just wait until Brian Burke hears that his team captain spent 20 minutes last week talking about the Toronto Maple Leafs without once mentioning the word "truculence," choosing instead to focus on words like "fast," and "up-tempo."

From a different point of view the qualities currently so characterized might be described as truculence and clannishness.

Note that you can build your GRE vocabulary via Vocab Assistant app hosted in facebook messenger.