A fat ass, typically referred to as Miguel De La Cruz, is a lazy fuck who loves sitting his ass down all day playing Rainbow Six Siege while yelling "HOW DID I NOT KILL HIM!?!?!? I SHOT HIM IN THE HEAD!!!!" with the sound of their keyboard being smashed in the background. Furthermore, when asked, fat ass will reject going out to hang with friends. What fat ass's friends don't know is that it's not that he doesn't want to go, it's just his musty ass is stuck in his chair from playing too much video games and he doesn't want to call the fire department to get it out. As usual, fat ass doesn't really have any real friends. All his "friends" are only there to get closer to fucking his sister.
Anyone whose body fat is exceeding healthy limits.
A person whose body is grossly out of proportion due to excess fat.
A very overweight person with the metabolism of a slug.
Being a fat ass can make you miserable because you begin to think you can't lose that weight.
Some people are proud of being a fat ass, but most people aren't.
Some people can't help being a fat ass due to medication or other medical conditions.