He's a world class athlete ... he trains every single day ... so Rampage Jackson decided to treat himself this weekend ... by chowing down like a fat kid at the Orange County Fair.
The former UFC heavyweight champ was seen carrying a block full of deep fried curly fries and a burger this weekend ... because he felt like it.
Rampage has plenty of time to work it off ... his next fight isn't until October.
Fun Fact -- The OC Fair is famous for deep frying ANYTHING ... including butter, brownies, kool-aid, bacon, cheesecake, oreos ... you get the picture.
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