In your ear stretching/gauging process, it is that ONE EAR. it's the one that is more difficult to stretch, takes longer to heal, and just doesn't look as good as the other ear, and you experience much more discomfort with it. it's a total bitch because it just won't cooperate with you. therefore, it is known as The Bitch Ear.
guy#1 "dude ! my left ear hurt more than the right ear when i stretched it last night."