godan verb (-ru), transitive verb
dis; diss; disrespect; badmouth; criticize
Slang verb derived from English 'dis'/'diss'. Used in casual speech to mean speaking ill of someone, putting them down, or showing disrespect. Often used among younger speakers.
See also: ディス
Don't say things that diss your friends.
彼はすぐ人をディスるから、あまり好かれていない。
He's not very well-liked because he's quick to diss people.