Guyz how do you define a needy g/f?

This could describe any girl who is in your face all the time. Although if she's needy for sex it's quite endearing.

If what she wants from you is more than you are able/willing to give. Needy is a state of mind. Basically, its more a question of how prepared you are to deal with her requirements that matters. Good luck.

One that does need you. Most woman are independent these days and it would make your ego boost to have a needy woman.
I suspect for most men its a woman that spends the mans money.
A woman that needs you to have common sense.
A woman that requires a bit more than what you are obviously prepared to give.
for most men woman are needy.
For Love I've always found the men are the neediest in that department.

Someone who is asking for more than you can give on a constant basis is a needy person.
Someone who is also constantly asking for things (time included), even if you can give it, is also needy.

i'm a needy girlfriend. but my boyfriend seems to not mind so much.

Hmmm, this is a slippery slope. A girl who needs to know where you're at all the time. Needs you to tell her how pretty she is constantly. Points out the most attractive woman in a room and asks if you think she is hot. One who asks all the time what we're thinking, we're guys, we don't think most of the time. One who always needs foreplay or to cuddle afterwards, there's nothing wrong with a passing quickie occasionally. I also think a girl who expects you to say "I love you" every time you go to hang up is annoying. And don't make a big deal out of us putting the toilet seat down. It will not break your hand to do it yourself once in a while.

i definitely agree with suetonious. someone who always has to spend every waking moment with you and wont let you breathe and wants to be the center of your everything is needy, but i do think sometimes you guys can turn us into needy people by making us feel insecure. if you let your girl know she means a lot to you and are clear on what you want out of the relationship and where it is going you would have a lot less issues. sometimes a girl becomes so called needy because she is struggling, trying to hold on to you or get some type of afformation. if you make all of the above clear and she is still ultra demanding then she is needy.