The slit you make in a hotdog before microwaving it to make sure it doesn't explode
*microwave goes POP really loud*
Guy: "man, you didn't make a ketchup trench. Go clean out my fucking microwave"
You gotta lick all the ketchup
ketchup rule boy
The Ketchup rule means you must lick it all if you drop it
Used to express positive agreement or excitement
"I got offered a job today" "Smooth Ketchup!"