指切 ゆびきりげんまん、嘘 うそついたら針千本飲 はりせんぼんのます
yubikirigemman uso tsuitara harisembon nomasu

Idiomatic Expression

1. cross my heart and hope to die, stick a needle in my eye; pinky promise pledge: if you're lying, I'll make you drink a thousand needles — literal

Related to 指切り
Other forms: