 The names Slartibartfast, Majikthise, and Vroomfondel were intended  to *sound* like rude words, whilst slipping under the radar of the  censors. According to Douglas Adams (qv), "Slartibartfast" started  out as "Phartiphukborlz", and then he played around with the  syllables until he had "something which sounded that rude, but was  almost, but not quite, entirely inoffensive."