Rob Dyrdek — Winner, Winner, Chicken Dinner

Rob Dyrdek walked away from the Breeders Cup a few pounds heavier yesterday … cause the MTV star won a TON of money!

Dyrdek was betting on the ponies at Santa Anita Racetrack in Los Angeles and dropped beaucoup bucks on the horse who eventually won the B.C. — Mucho Macho Man.

Mucho came in second last year … but took first Saturday afternoon after winning the $5 million prize by a nose.

Before the race Dyrdek said he”d get “a whole lotta cash” if M.M.M. won.

Once it was over, Rob didn”t divulge the amount … instead he posted the photo above.

Ohhhhh yeaaaaahhh (get it, Macho Man.)