Reverse trash talking is a kind of trash talk in which a person cannot say anything bad essentially. It is done by boosting a person’s attributes, behavior by using a rough tone. In trash-talking arrogant and offensive comments are made to demoralize opponents. Reverse trash-talking is done more nicely by weirdly praising a person.
Example: In a normal tone, we can complement a person by saying, ‘you wearing an amazing suit.’ In reverse trash talk, you will be saying the same in a hard and rough voice.
All-time WWE superstar John Cena has explained this term in The Late Late Show with James Corden.