阿呆の三杯汁
Meanings
1
only a fool asks for more than one extra helping; only fools are gluttons
Proverbial idiomatic expression criticizing greed or lack of restraint, especially when asking for repeated servings. The image is of a fool who keeps asking for more soup (三杯汁) without regard for manners.
There is a proverb that says 'only a fool asks for more than one extra helping.'
He kept asking for seconds again and again, just like the proverb about the fool and the three bowls of soup.