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Fatty McButterpants 

Possibly the best thing you can call a fat person.
Hey Fatty McButterpants, are you going to down that Big Mac™?
Fatty McButterpants by Kadman July 21, 2008

Fatty McButterpants 

The guy at Walmart who’s cheeks don’t both fit on the scooter and in his basket.... three butterfingers, Cheetos, Doritos, Spam and deep fried Oreos.
If Tim doesn’t lay off of those Lando-Lakes candy bars he’s going to become Fatty McButterpants!
Fatty McButterpants by BobRoss14 February 4, 2019

Fatty McButterpants 

1.) One who indulges one self with a grossly amount of desserts
2.) a person who says "derricious" often
3.) lard
4.) a person who smiles and jumps up and down when they see or think of food.
5.) a person who points to another person calling them a Fatty McButterpants
Meng: cookies and ice cream?
Mike: Fatty McButterpants
Sam: Ooo! Ooo! I want some!
Brian: anyone want some lard?
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