A fat minded person thinks and acts in a way that will make him/her fat.
"She finally found an healthy recipe but she's always making and eating it at 3 AM."
"Yes she's fat minded."
"I ate healthy yesterday so today I can eat pizza."
"You're so fat minded."
Someone who is so lazy that they can't even be bothered to do something that requires the smallest amount of cognitive ability.
Ezra: I found a place to get cheap iPod headphones!
Chase: WHERE?
Ezra: They're like 6 bucks on the Internet
Chase: Meh, I don't care THAT much
Ezra: You are so mind fat
Chase: ...
Ezra: ...Want me to get you the link?