What does sour scholar mean?

Sour name: it mainly plays one of the foot colors of young literati's zaju, and is also a derogatory term for literati.

Acid [form]

(1) shabby; Pedantic. Describe a scholar's poverty

(2) Another example is Acid Ding (a derogatory term for poor scholars); Sour son (a disparaging term for scholars); Sour money (pretending to entertain people); Acid theory (platitudes); Sour vinegar (fake sven); Sour leek rotten tofu (laughing at the reader's words); Sour and cold (describing the embarrassment of poor scholar's life); Acid (butyl acid); Acid does not slip (describing the pedantry of literati); Sour pedantry (sour pedantry)