It's where fat people talk.
Example of Fat talk:

Fat woman 1: Hey did you try the new Big mac?
Fat woman 2: No, is it yummy?
Fat woman 1: Yes! I got the quad big mac, it's amazing! I ate it all in 2 minutes.
Fat woman 2: MMMMMMMMMMMMMMMM!
by EpicSwag December 5, 2013
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To speak as if you weren't watching your weight, pretending as if you were overweight and eating anything you want
Person 1: Let's talk fat, like let's forget that we're trying to watch our diet let's pretend we're getting like Happy Meals.
Person 2: Let's pretend we're giant Globglogabgalabs.
by Joakwin October 6, 2023
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