Previously a term used to describe
Indian soldiers/policemen who served the British Empire when India was under the
British rule.
Nowadays, this is a derogatory term used for Non-Resident Indians (NRIs) who still do the bidding of the British Empire either in a professional or
casual context.
Sunil: Hey did check out the article on Reddit India today?
Ravi: That subreddit is full of sepoys,
don't take anything you
read there as a representation of actual India.