When we talk about "primitive man", we're usually talking about cavemen and other people who existed before the advent of table manners, but if your uncle speaks grunts and chews with his mouth open, you could describe him as primitive too.
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When we talk about "primitive man", we're usually talking about cavemen and other people who existed before the advent of table manners, but if your uncle speaks grunts and chews with his mouth open, you could describe him as primitive too.