'Sugar' Shane Mosley -- Shamed by WBC for Pre-Fight 'Ass-Slap'

"Sugar" Shane Mosley and Ricardo Mayorga just got put over the WBC's knee and given a metaphorical spanking for that ass-slap during their pre-fight news conference.

The World Boxing Council called out both fighters for what it calls an "embarrassing fight simulation." While most fans took Mayorga tapping the butt of Mosley's GF for what it was -- great publicity -- the WBC feels it could have been dangerous.

In short, it says just because Mosley and Mayorga knew what was going to happen ... innocent bystanders still could have been hurt.

The boxing org pointed out its late President, Jose Sulaiman, was infamously injured during a similar pre-fight scrap between Mike Tyson and Lennox Lewis in 2002.

Now go to your corners, boys.