It depends on whether English is their first language or a second one just learning. Either way, calling them anything does not help much.
a jock?
"omnipresent"
A person whose arteries to the heart become clogged has a cholesterol.
English
super
An orphan
A native English speaker.
you call them sir or ma-am
lumber-jack
Scientist
A person in their 40s would typically be referred to as middle-aged.
the word chucho is how we call a person whose name is Jesus.