Trash talking is the way of talking to demoralize or humiliate an opponent by making arrogant or offensive comments. It is a kind of taunt often heard during sporting events. Rhetoric and metaphorical language are often used in trash-talking.
It may also be used in a lighthearted manner. Muhammad Ali, the world-famous boxer, was known for his trash-talk.
Sporting communities are recognizing trash talkers for both their trash-talking talents and their competitive and intellectual ability. It is known as sledging in cricket, while in ice hockey, it is known as chirping.