Fighting talk
Definition 1 of 1
Pro Tip 1/3Confrontational Tone
Used to challenge or provoke; often seen in debates or arguments. 
When he said 'Let's see who's in charge,' it was fighting talk.
Pro Tip 2/3Not Literal Fighting
It doesn't mean physical fighting, but rather a verbal stance showing readiness to argue. 
Her defense of the project was pure fighting talk, daring anyone to contradict.
Pro Tip 3/3Emotional Intensity
It suggests strong emotions and is usually impassioned or zealous. 
His promise to win the match was more than pride—it was fighting talk.