It's not fat - it's just big boned!
Big Boned is an impactful font. In fact, it bears many similarities to Impact, that famous meme-script. It's meant to be built studs up, where one character is between 4-7 studs wide and a 5 bricks high. The Q is an odd exception at the moment - to keep the fonts character I had to make it 6 bricks high. Feel free to experiment and make it better.
It's highly suitable for cartoonish or exaggerated phrases. Play around with embedded and embossed variants for extra effect.