Eat a Richard
You're telling someone to choke on a meaty thing because Richard is just a name for a penis.
My brother said, 'Eat a Richard, you shortstack!' after I beat him at video games.
My neighbor yelled, 'Eat a Richard!' because I parked my bike on his lawn.
My friend's dog got told to 'Eat a Richard' by his owner for peeing on the carpet.