it could actually mean both either a relationship or a hook up, it pretty much means that the person is single and okay with it and ready to get back out into the dating scene and see what may happen.. Now some people say this just when they want to have fun with other people or not really get serious because they are still a bit cautious of a full on relationship, but it is a good sign that the person is wanting to get back out there and start making new connections. if you like this person, go for asking if they want to hang out and see how it goes, you can normally tell from one date or hang out session if all they want is a hook up or a relationship. Good Luck!!