According to Wikipedia, "an anagram is a type of word play, the result of rearranging the letters of a word or phrase to produce a new word or phrase, using all the original letters exactly once; for example orchestra can be rearranged into carthorse. Any word or phrase that exactly reproduces the letters in another order is an anagram. However, the goal of serious or skilled 'anagrammatists' is to produce anagrams that in some way reflect or comment on the subject. Such an anagram may be a synonym or antonym of its subject, a parody, a criticism, or praise; e.g. William Shakespeare = I am a weakish speller."