To indulge or gratify someone's desires, especially unworthy ones; to cater to low tastes.
From Pandarus, a character in medieval literature (from Chaucer's Troilus and Criseyde) who acted as a go-between for lovers. The term originally meant a pimp before extending to mean any catering to base desires.
The word 'pander' actually comes from a character's name—Pandarus became so famous for his role of arranging romantic liaisons that his name became a verb, a rare example of a proper name transforming into common slang.
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