I'm gonna plant my foot, up your ass!
It means you’re about to get a foot so high, it will be the highlight of their worst day. It’s not a joke. It’s a foot attack.
I'm gonna plant my foot, up your ass! You just said my art was ugly.
I'm gonna plant my foot, up your ass! You just took my seat on the bus.
I'm gonna plant my foot, up your ass! You just told my brother I was a crybaby.