Tyson Fury On Deontay Wilder's Cheating Allegations, 'He's Lost His Marbles'

"I think he has lost his marbles"

That's Tyson Fury shooting down Deontay Wilder's claim that he CHEATED during the Feb. rematch ... saying Wilder just can't accept that he got his ass kicked.

Two weeks ago, Wilder didn't mince words -- accusing Tyson Fury of hiding weights in his gloves to increase the impact of his punches during their Feb. 22 fight.

"I highly believe you put something hard in your glove," Wilder said on video ... "Something the shape and size of an egg weight."

Wilder believes the foreign object caused his face to "swell up in the shape of an egg weight and it left a dent in my face as well."

A boxer accusing another boxer of loading up his gloves is a major allegation -- especially with no real proof.

But now, Fury is firing back ... claiming it's just another pathetic excuse from Wilder, who already tried to name the loss on his pre-fight costume, among other things.

"First of all it was the suit, then it was the bicep injury, then his trainer was on our team, then the referee was against him, then I had weights in my gloves," Fury told TalkSport.

"Now someone has spiked his water ... it’s one of those things, isn’t it?"

Fury is also addressing Wilder's claim that he's refusing to take a 3rd fight -- staying, it's Deontay who's pushing the dates.

"The original date was July 18," Fury said ... "That didn’t happen because he had an injury so it got put back 3 months to October. Then that didn’t happen because they were trying to get a venue."