A misreading of "coolio"
"Hey man did you see that guy who wrote 'ohroon' on his epitaph?"
"Nah, he was actually trying to write 'coolio'"
A misreading of "coolio".... If you turn your head right it looks like the "n" is a "c", the "r" is an "L" and so on.
"Hey man did hear about that guy who who wrote "ohroon" on his gravestone?" "Nah he meant to put "coolio"...