Exminger

Noun; a corruption of the contraction of 'smoker' and 'whinger', denoting one who has quit the habit and continually tells smokers how bad it is for them, just in case they've never read a paper, a health-warning, spoken to their GP, or watched the cancer ads on TV.

He was an exminger to the core, could suggest a thousand more preferable ways to die than by the inhalation of tobacco smoke, such as being trampled to death by vestal virgins with loose skirts and no underwear,