The correct way to say this would be "Mark HAD lunch." This means he already ate it. You could also say "Mark WILL HAVE lunch," meaning sometime in the future. Another correct sentence would be "Mark HAS lunch." This means that he is in possession of lunch but has not eaten it yet.
you've got is another way to say you have.
et cetera is another way to say and so on
It can vary from family to family. I call my friends freckles angel kisses, its like coffee stains, another way to say birth mark.
Another way to say 'events' is 'functions'
Another way to say horizontal is flat, even, or level.
Verbose is another way to say big words.
Another way to say poop is "feces" or "stool."
Another way to say DNA is deoxyribonucleic acid.
another way to say only is but what's more ,you will find or as well as.
Another way to say "back and forth" is "to and fro."
another way to say bone