Definition
An expression used to indicate annoyance or disagreement with what has been said.
（表示恼怒或不同意）你这是什么意思？
What do you mean I didn't try hard enough? I've been working late every day.
你是说我不够努力吗？我每天都工作到很晚。
What do you mean exactly when you say I should have done better?
你说我应该做得更好，到底是什么意思？
'This is too expensive.' 'What do you mean by too expensive? I think the price is reasonable.'
'这太贵了。' '你说太贵是什么意思？我觉得价格很合理。'