eat a cactus
A mean way to say you want someone to suffer forever, like they're stuck in a desert with no water and a thousand spiders
My brother yelled 'eat a cactus' when I spilled soda on his brand new shoes.
My mom said 'eat a cactus' when I failed my math test for the 10th time.
My friend called me 'eat a cactus' because I wore socks to school on Friday.