system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is a 'beer belly'?

How do they form and what do they consist of?
gpt
It's actually a combination of fat from a poor diet and an inflamed liver. Alcohol causes inflammation of tissues, particularly in the liver. Add in a crappy diet with carb-heavy beer, and the gut takes on a swollen appearance. Just a plain old fat belly won't be as round and swollen looking as a beer belly because a beer belly is actually swollen.