On 'Celebrity Fit Club' in the US Dustin Diamond aka Screech from Saved By the Bell rants about his fellow 'celebrities.'
He says "I would like to slap the spit out of their mouths!"
He also calls American Idol reject Kim Locke a loser from another show and a "big girl."
But the other contestants don't just sit back and take it.
One says he would like to "whip his ass."
Kim hits back by bringing up the subject of Dustin's porn tape and the time he was selling T-shirts to pay for his house.