An abbreviation for "Fucking Disco Stick Rider". Though the origins are ambiguous, the term may have taken root as a bastardization of a line from Lady Gaga's contemporary hit "Love Game". The pejorative declaration indicates a contempt for its recipient. Although the term is often applied to males it does not necessarily equate to an accusation of homosexuality, like the oft used "fag" in American-English lexicon, the phrase performs as an overly generalized insult readily applicable to a myriad of situations and contexts.
A: "Ezekiel forgot to pick me up from the train station so I was forced to huddle together with street people for warmth."
B: "What blatant neglect for a friend. Sounds like an FDSR to me."