「割四赔五」是什么意思？

2026年新闻梗：河南夫妻跨省到湖北帮农户收割小麦，谈好按4亩400元成交，收割后农户却反悔按5亩索赔；成为讽刺契约精神缺失的流行语。

EN2026 news meme: a couple agreed to harvest wheat for 4 mu/400 yuan, then the farmer demanded 5 mu after the work was done — shorthand for broken contracts.