Hachinpa
Hachinpa is a swear word you shout when someone tells a lie so big it makes your brain hurt. It’s like saying 100 percent, but with a lot more swearing.
Your teacher: Hachinpa? I didn’t miss a single day of school.
Your brother: Hachinpa? I didn’t even sleep last night.
Your crush: Hachinpa? I didn’t eat your lunch.