In this case chatgpt is right though. It might surprise you, but words can have different meanings and those meanings can change over time.

chav /chăv/ noun

1. Used as a disparaging term for a poor or uneducated young person, especially one who behaves in a brash or vulgar manner and wears ostentatious clothing and jewelry.
2. A working-class youth, especially one associated with aggression, poor education, and a perceived “common” taste in clothing and lifestyle.

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