That one member of a group who always finds something to complain about in a situation. Whether they're at a party or a free concert they always find something about the situation to bitch about.
The Weeping Vag is that one person you always question why you're friends with them, or even invited them to hang out.
weeping vag is also known as a soggy puss
Jeff: Why'd we invite Mark to go to the concert tonight. All he's been doing is bitching about how expensive beer is and that his feet hurt.
Steve: I know he's such a weeping vag.