The famous '意思' joke: '你这是什么意思?' '没什么意思,意思意思。' '你这就不够意思了。' '小意思,小意思。' — five different senses of 意思 in one exchange. 意思意思 here means a small token gesture, often a gift or treat.
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Colloquial. Can sound subtly like a euphemism for a bribe in business contexts (a 'small token' that opens doors). Read the room.