diss

Short definition from Wiktionary

Verb

1. 1
   To put (someone) down, or show disrespect by the use of insulting language or dismissive behaviour.

Noun

1. 1
   An insult or put-down; an expression of disrespect.
2. 2
   Dissertation.
3. 3
   Ampelodesmos mauritanicus syn. Ampelodesmos tenax, a reedy grass used for cordage.

Proper noun

1. 1
   A market town and civil parish with a town council in South Norfolk district, Norfolk, England (OS grid ref TM1179).
2. 2
   A locality in Yellowhead County, Alberta, Canada.