Eat my kitty litter
A loud and smelly insult you use when you're really mad. It’s like saying someone smells like a garbage can on a hot day.
My sister said 'Eat my kitty litter' when I took her favorite toy.
He yelled 'Eat my kitty litter' after I told his secret to the whole school.
She told her pet 'Eat my kitty litter' when it knocked over her glass of milk.