Sean Strickland has harsh words for Din Thomas after UFC 330.

A former fighter and veteran MMA coach, Thomas ended up at the center of a social media storm this past weekend after announcing his retirement from corner work following his fighter Gillian Robertson's loss to strawweight champion Mackenzie Dern in Saturday's UFC 330 co-main event.

Following Din's comments, fans and media members criticized Thomas for choosing a low moment to abandon Robertson, who he's coached for years. Now, Strickland is adding his two cents and he's not being diplomatic about it.

“Din Thomas is a f*cking c*nt,†Strickland wrote on Twitter. “I've had my ass kicked in multiple weight classes through my career and won two titles. You're a dickhead. It's probably better you retire. You're a shit coach.

“You only lose when you quit. Din sounds like you're a f*cking loser.â€

Strickland's response carries some weight given his own career experiences. As he pointed out, he began his career as a promising welterweight with an uneven record before moving up to 185 pounds where he established himself as a contender before breaking through and winning a UFC title with a memorable upset of Israel Adesanya in 2023. He is currently in his second reign as middleweight champion after defeating the previously unbeaten Khamzat Chimaev at UFC 328 this past May.

Whether Thomas intended to slight Robertson or not, his retirement announcement came at an awkward time given how his fighter struggled in her five-round loss to Dern. Robertson went 5-0 after dropping down to 115 pounds to earn her title shot and was aiming to become Canada's first UFC champion since Georges St-Pierre.

Strickland defended Robertson's effort replying to a Twitter commenter.

“He's just a c*nt,†Strickland said. “Girl goes out there and tries to do something and you put her down. Dickhead.â€