端起碗吃肉，放下筷子骂娘
duān qǐ wǎn chī ròu , fàng xià kuài zi mà niáng
lit. to eat meat from one's bowl, then put down one's chopsticks and scold one's mother (idiom)
fig. to complain despite being privileged; to be ungrateful for what one has been given
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