In North America it means "bum". In other English speaking countries it is different part of the anatomy.

>I believe that would be bum to you?
>
>>I always have to remind myself what you Yanks understand "fanny" to mean - not to say it doesn't spice up my day :)
>>
>>>Now if you told me I might get kissed or my fanny slapped by oRox I just might do it!!! :)