Your favorite funny 40th birthday cards that will make her laugh. If you're looking for some hilarious 40th birthday cards to send your girlfriend, then you've come to the right place. We've got everything from funny jokes to clever puns. If you're having a hard time coming up with something fun, we've also got lists of some of the funniest things to say when you're proposing or sending your girlfriend off on her special day. Whether you're celebrating with friends or by yourself, we've got the perfect card for you!