As a noun:
* "He threw some serious diss at her in his rap song."
* "The movie received a lot of diss from the critics."
As a verb:
* "She dissed his new haircut."
* "He dissed the band's performance."
The term "diss" is often used in rap music and hip-hop culture, where it has become a common way to boast or challenge others. However, it can also be used more generally to describe any kind of disrespectful or negative comment.
Here are some synonyms for "diss":
* Disrespect
* Insult
* Criticize
* Put down
* Slam
* Bash
* Trash
* Belittle