The book, narrated by Alex, contains many words in a slang argot which Burgess invented for the book, called Nadsat. It is a mix of modified Slavic words, rhyming slang and derived Russian (like "baboochka"). For instance, these terms have the following meanings in Nadsat: "droog" (друг) = friend; "moloko" (молоко) = milk; "gulliver" (голова) = head; "malchick" (мальчик) or "malchickiwick" = boy; "soomka" (сумка) = sack or bag; "Bog" = God; "horrorshow" (хорошо) = good; "prestoopnick" (преступник) = criminal; "rooker" (рука) = hand; "cal" (кал) = crap; "veck" ("человек") = man or guy; "litso" (лицо) = face; "malenky" (маленький) = little; and so on. Some words Burgess invented himself or just adapted from pre-existing languages. Compare Polari.