One of Alex's doctors explains the language to a colleague as "odd bits of old rhyming slang; a bit of gypsy talk, too. But most of the roots are Slav propaganda. Subliminal penetration." Some words are not derived from anything, but merely easy to guess, e.g. "in-out, in-out" or "the old in-out" means sexual intercourse. "Cutter", however, means "money", because "cutter" rhymes with "bread-and-butter"; this is rhyming slang, which is intended to be impenetrable to outsiders (especially eavesdropping policemen). Additionally, slang like "appypolly loggy" ("apology") seems to derive from school boy slang. This reflects Alex's age of 15.