Zuòwéi yī wèi měishíjiā, tā zǒubiàn quánguó pǐncháng gèdì míngcài.
As a gourmet, he traveled across the country to taste famous dishes from every region.
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usage
美食家 is a formal, respectful term for someone with refined culinary taste. The casual equivalent is 吃货, a self-deprecating or playful term for a food lover.