Here's a couple of links Lucy that gives you the general idea of what "taqqiya" is:
http://www.al-islam.org/encyclopedia/chapter6b/1.html
http://www.google.com/search?q=%22taqqiya%22&hl=en&lr=&filter=0
Thanks, Cindy, it's an euphemism for lying; here's what I found:
"Taqqiya" is permission for Muslims to hide their faith when living in hostile conditions, even if it means outright lying.
TAQQIYA:
The Shi'ah believe in a doctrine called Taqiyyah which means that a person holds a specific belief in his heart but his speech is contrary to his inner beliefs.
[A lie by any other name is still a lie.]