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1.
What one calls a relatively fit person upon seeing them consume vast quantities of unhealthy food. Commonly used among college-age people, this nickname refers to being an obese person. Often associated with the freshman 15, sophomore 30, junior 45, and the most prestigious senior 60.
"Oh my god, another bowl of ice cream? Man, I can't wait for you to turn into a fat chad. It's going to be epic."

"Wow.... you better work out ya fat chad."
by bustahbrown October 31, 2010