eat my left
Eat my left is like telling someone to swallow your left nut and then spit it out in front of everyone. You’re saying they’re too dumb to even be near you.
He stole my lunch. I said, 'Eat my left!' He ran away.
She called me a baby. I said, 'Eat my left!' and she went silent.
When my brother took my last cookie, I told him to eat my left.