a cousin eddie
A cousin eddie is when you let out a fart so big and smelly it feels like someone threw a rotten egg in your face and it won't stop.
My cousin eddie hit me in the face. I almost ran out of the room.
He let out a cousin eddie so bad it smelled like old cheese and dead animals.
He let out a cousin eddie in the car. I had to open the window and it still smelled like a garbage can.