Definitions for DISS
diss, insult, affront(verb)
treat, mention, or speak to rudely
"He insulted her with his rude remarks"; "the student who had betrayed his classmate was dissed by everyone"
An insult or put-down.
To put (someone) down, or show disrespect by the use of insulting language or dismissive behaviour.
Origin: Originated in Jamaican Vernacular English, perhaps originally short for disrespect or disparage.