already-existing coffee
Also called AEC (not to be confused with AOC). Not-exactly-fresh coffee. Coffee still in the pot from the morning, or the previous night.
"Hey, you want some coffee? I've got some left over from breakfast, or I can make a fresh pot..."
"Nah, don't bother with fresh, already-existing coffee will be fine."
"Nah, don't bother with fresh, already-existing coffee will be fine."