Bloggers make it into the dictionary for the first time

They are joined by "the Brazilian wax" and the word puzzle "sudoku" in a list of 500 new entries.

New words are linked to a wide range of subjects, from the Iraq war - which gives rise to the entry "to sex up" - to technology and beauty treatments.

Bingo wings is the name given to skin hanging down from people's arms as they raise their hands in victory at bingo.

The dictionary also includes a raft of new words people use to describe others they consider unattractive or overweight, including "munter".

While the decision on what goes in is human, we have some heavyweight software to help us Ian Brookes Chambers Dictionary editor

"Muffin top" - a layer of fat that protrudes over a pair of too-tight low-cut trousers - is also included.

Apple's hugely successful MP3 audio player, the iPod, makes it into the edition, the first since 2003, and the 10th since 1831.

Editor Ian Brookes said every new edition of the dictionary provided an insight into society at the time and how trends changed.

"We have a database of more than 80,000 possible new words and while the decision on what goes in is human, we have some heavyweight software to help us," he said.

The iPod MP3 player is another new addition

"It needs to be used frequently enough and by a wide range of people, not just a certain group, say butchers or people living in Coventry."

To "sex up" also makes it into the new dictionary as a reference to making something more interesting.

It entered common usage to describe claims that the government changed intelligence reports in the build up to the 2003 Iraq war.

Islamophobe - a description of a person who hates or fears Muslims - also makes it into the book.

A rise in terms used for anti-social activities also means words such as "Asbo", "chav" and "happy-slapping" - a violent game where youths capture assaults on their mobile phone cameras - are also common enough to include.

Chav and Asbo have already appeared in other dictionaries.

The book includes some new tongue-twisters - fundoplication (a surgery to help with heartburn) and iraimbilanja (Madagascar's new unit of currency).