A mix of "liberal" and "pederast", a
derogatory term describing a liberal. Used mostly in russian informal speech, along with "tolerast" and similar
constructions. Generally was created as a populist device describing someone who wants to lower or remove social obligations of the state towards its population - raise the pension age, close hospitals or schools in areas where there is clearly not enough people to warrant the expense, stop supporting clearly non-profitable, but important for lessening
unemployment industries, and so on.
Expanded to anyone having any ideas that could be identified as "liberal" - freedom of press, turnover of power and so on.