An anagram is where the letters in a word/name/etc are rearranged to create a new sentence. Usually the best are funny ones that relate to the subject.
eg:
Gavin Andrew Westwood = Wow! Now
deviant grades.
Hewlett Packard =&'Wet PC = death lark'.
William Jefferson Clinton = Jilts nice women. In for fall.
President Boris
Yeltsin = Endless
insobriety trip.
The last two anagrams are from Anagram Genius (http://www.AnagramGenius.com)