吃饱了撑着;吃饱了没事干 = with full bellies and nothing better to do
英语六级阅读题:
“Some foreigners with full bellies and nothing better to do engage in
finger-pointing at us,” he said. “First, China does not export
revolution; second, it does not export famine and poverty; and third, it
does not mess around with you. So what else is there to say?”