He's a real eater - goes at food like his life depends on it.
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Internet slang since ~2020, often as 干饭人 ('rice-devouring person'). Casual only - in formal settings say 吃饭. Note the tone: 4th-tone 干 ('to do') differs from 1st-tone 干饭 ('dry cooked rice') which is an older, unrelated term.
