noun
scrumper; smiley piercing; upper lip frenulum piercing
A type of piercing through the upper lip frenulum (the small fold of tissue connecting the upper lip to the gum). Often called a 'smiley piercing' in English because it is visible when smiling.
彼女はスクランパーを開けて、笑うとそれが見える。
She got a scrumper piercing, and it shows when she smiles.