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So about that offer for Conor McGregor to use Floyd Mayweather’s gym …

Yeah. Maybe Mayweather shouldn’t expect McGregor to take him up on it any time soon. In fact, it sounds like McGregor still has plenty of beef with his onetime boxing adversary.

McGregor on Tuesday night tweeted unpleasantries, to be nice about it, in Mayweather’s direction.

“(Expletive) the Mayweathers, except Senior and Roger,” McGregor wrote on Twitter. “There is no peace here kid. Step up or step down.”

Earlier today, Mayweather told TMZ Sports in a walk-and-talk interview that he wanted McGregor (21-3 MMA, 9-1 UFC) to train at his Las Vegas gym ahead of his lightweight title challenge against champion Khabib Nurmagomedov (26-0 MMA, 10-0 UFC) at UFC 229 on Oct. 6 at T-Mobile Arena.

“I know that UFC has a training facility, but we’d like him to work at the Mayweather boxing club,” Mayweather said.

Then he seemed highly complimentary of his opponent, just two days after the one-year anniversary of their boxing match, which Mayweather won by a 10th-round TKO.

“From what I know, (Nurmagomedov is) a hell of a grappler, and he can wrestle,” Mayweather said. “But you know, the fans want to see you stand up and fight. That’s what they want to see. But Conor McGregor’s a tough competitor. Conor McGregor’s not going to back down from anyone. He’s not scared. He’s a warrior.”

McGregor didn’t indicate precisely what his comment was about, but there’s little room for interpretation when an opening line like “(Expletive) the Mayweathers” comes after Floyd seemed to reach out not as a potential future opponent, but merely as a former one.

McGregor will be attempting to win back the lightweight title he held before it was stripped of him earlier this year and placed around Nurmagomedov’s waist after he beat Al Iaquinta in Brooklyn.

That win coincided with McGregor’s now-infamous attack of a bus filled with UFC fighters, including Nurmagomedov. McGregor found himself in hot water, legally, after that and recently pleaded guilty to lesser charges to avoid a felony record. He avoided jail time.

For more on UFC 229, check out the UFC Rumors section of the site.