Definition
To make critical or insulting remarks, especially towards an opponent.
论调漆责，出言不道德（尤指对对手）
Before the game, both teams were talking smack to each other.
比赛前，两支队伍互相放狠话。
He always likes to talk smack about others, which is not friendly.
他总是喜欢说别人的坏话，这很不友善。
Stop talking smack and focus on doing your job.
别再胡说八道了，专心做好你的工作。