Caffeinoisseur 

An expert in everything caffeinated. Coffee, tea, soda pop, etc. (See coffeenoisseur).

A caffeinoisseur will be able to taste the difference between green tea from decaf tea..

Caffeinoisseur by fredskiskiski June 19, 2017

Coffeenoisseur 

A coffee connoiseur. An expert in the ways of coffee. Usually a nurse.

Fred is a coffeenoisseur, he'd be able to distinguish regular coffee from decaf. 👌🏼

Coffeenoisseur by fredskiskiski June 19, 2017