Ex-MGM Mogul Kirk Kerkorian -- Wife Loses Bid for $500K in MONTHLY Horse Expenses!

Ex-MGM mogul Kirk Kerkorian just scored a knockout punch against his ex-wife Lisa Bonder ... a judge just shut down her request to up monthly child support from $100K to $565K.

It's a spectacular defeat for Bonder, who claimed their 16-year-old daughter Kira needed $491,000 a month just for equestrian expenses. Kira is an accomplished rider who has Olympic aspirations, but apparently the judge found Bonder's request ridiculous.

The judge felt Bonder could make do with $100,000 a month ... which by the way is the largest child support award on record in the U.S.

The judge scoffed at Bonder's request in his written ruling -- obtained by TMZ -- saying, "There is a difference between the 'needs' of a child and the 'wants' of a child."

Here's what's really amazing. Kerkorian and Bonder were married a grand total of 28 days back in 1999 and the child isn't even his ... when he agreed to pay support he didn't know Kira wasn't his biological child.