Catharsis is described as
"providing psychological relief through the open expression of strong emotions; causing catharsis"
An online resource mentions
"The Buddha has thus presented the principles of the catharsis of emotions..."
It is my understanding that gossip is not looked upon favorably in Buddhism. I am unsure why though.
Rightly or wrongly, i practice catharsis through open dialogue with others. This may be in relation to others or myself. For example, if i am faced with a challenge which i am aware and mindful gives rise to emotions such as frustration, anger, helplessness, etc, i often discuss these with close family.
Working with a real-world example, currently i am faced with someone who simply does not wish to work with others in a meaningful way nor takes proactive steps to work with others. Often this is seen as being a roadblock of sorts and more than often, there is little trust in working with the person. I have attempted on multiple occasions to work with this person in a way to go beyond the trifles and historical 'negative' experiences which has been less than successful. Now i undertake catharsis by discussing the concept of 'how it blows my mind" that someone is not willing to work in meaningful ways.