one who is highly stressed, and uses sucking cocks as a relief. Also it is known that this individuals neccessity to relieve thier anxiety leads to uncleanliness. consequently they may be know to be a dirty cocksucker.
there have been many met in my life, but the one who qualifies as a chain smoker would be Chris Proctor.
A homosexual; a guy who gives head to other guys.
Watch out for Phil, he's a real dick smoker.