"Pain in the ass" means something that's annoying or causes you too much of a hassle. "Waiting on this taxi is such a pain in the ass when I've got to get to work right away." "You're such a pain in the ass!" "This headache is a real pain in my ass!" etc. In the case of the comment about women, that would generally be considered a sexist remark, so you'd better make sure you say it only around like minded guys, and the phrase "pain in the ass" is considered vulgar, so don't use it in formal situations...

"Pain in the ass" is a vulgar usage in English. You should use this only in with friends who are familiar with you. "Pain in the neck" also means the same but is formal. In the context of its gender usage would be sexist. So use this phrase with care.

意思就是说 ’女人很麻烦‘。如果你的屁屁疼的话，是不是很麻烦呢？=] 其实如果直接翻译的话，就是屁屁疼。希望你了解我在说什么。