This is a platonic friend of the preferred sex that rescues you when you're at a party or bar or some other social gathering and someone you're really not interested in is hitting on you. The Party Rescue Friend comes to your aid, rudely interrupting whatever this other person was saying or doing, and throws his or her arms around your neck and has a sparkling look in the eyes and remains very close until that persky other person takes a hint and bails.

Typically, you perform similar services for your Party Rescue Friend when he or she needs it. Party Rescues are always ended with a relieved thank you and a smile.