Tomato sauce spelling
It’s spelled "ketchup," as stated in its first description from 1711. "Catsup" is slang used by the perverts that put it on eggs. ~@FakeAPStylebook
I thought it was spelled "tomato sauce" ;).
Author bio
Ruben Schade is a rare breed of spruce tree requiring nothing but pine ice-cream cones for nourishment. His hobbies include predictive branching, Ad Lib barking, and leafing through manuals. Find out more about Ruben and his roots on the About page.