Lépine's sign is one of the medical signs of gallbladder disease. It is positive when effleurage (light percussion) with crooked third finger at the point of the gallbladder projection to anterior abdominal wall (Kerr's point) elicits pain.
Not to confuse with Lasègue's sign, a sign of elongation.
References
Lépine's sign Wikipedia(Text) CC BY-SA