The metaphorical key one individual is holding within a group.
Whoever is holding this key has been the last one to ruin his/her, what seemed to be, 100% chance of getting laid.
Named after pandas because pandas never f*ck.
(The morning after a party)
1: Oh man, I hate myself
2: Why, what's happened?
1: You know that chick last night? The one who was flirting with me all night? When she told me she was leaving and going home all by herself, you know what I said to her? "Goodbye".
2: Hahaha, you, my friend, have just been given the panda key.
Circular pattern of chest hair around the nipples on a dark-haired white guy. Usually when the chest hair is only around the nipples. Named for the way it resembles a panda's dark eyespots on a white background.
The first time I saw Will Clark topless, all I could think was "Jaysus, he's got some serious panda nipples!"