The word abdominous paints a picture of someone with a very noticeable stomach, such as the Laughing Buddha or Santa Claus.
Abdominous comes from a Latin word meaning "belly." It specifically highlights the feature of a noticeable, round stomach. You can use this adjective to evoke a mental image of a belly that stands out and makes a statement, emphasizing its size and prominence. For example, you could say, "The abdominous sumo wrestler laughed heartily, his belly shaking with each chuckle."