The sentence "xx is not fragrant" is a kind of ridicule. For example, if you see something uneconomical or incompatible, you will say that it is better to "buy ribs" or do other things that you think are cost-effective, so as to express your feeling that it is uneconomical.
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This sentence comes from a short video of an old man pushing a bicycle and chatting with a man in rags. The general content is "don't look at my work, I earn 1 hour 100 yuan." I went back to this dress, and 100 yuan was used to buy spareribs for a taste, which shows that my work is still worthwhile.
Later, it was extended by the majority of netizens as: "100 yuan is not as good as buying ribs for this." For example, "it's not fragrant to travel on such a hot day and buy ribs with travel money."