a euphemism for ecstasy, for talking about it in public
there's no real reason why the word ketchup is used...it just works because it's common and something you ingest
Ketchup is actually from the Cantonese word "ket-zup'" (emphasis on the second syllable) and it means "tomato sauce". It migrated to North America with the workers on the American and Canadian railroads, who often later started chinese restaurants throughout the US and Canadian mid-west.
A red, extremeley viscous liquid made from pureed tomatoes that is often used as a condiment. Was considered a vegtable by Former American President Ronald Regan.