https://www.sport-express.ru/martia...hnika-habib-zhestko-vysmeyal-serrone-1630944/
https://www.championat.com/boxing/news-3945827-nurmagomedov-vysmejal-serrone.html
https://www.sports.ru/boxing/1082236591.html
I'm not an instagram user, but I guess this is from "stories" or whatever, it's not a regular instagram post.
Khabib commented on a recent video that UFC posted where Cowboy talks about his emotions ahead of a fight.
He simply posted "A Cowards mentality".
Khabib uses the word "ochkoshnik" which is coward, but a little more disrespectful = The literal translations is somebody whose asshole shrinks out of fear

.
Here's the whole video that he's referring to.
WTF? Guess Khabib doesn't have much respect for this upcoming matchup, calling Cerrone a second tier fighter before.
EDIT:
This may add a little context.