Polite euphemism used to replace a popular expletive, the exact meaning varies depending on context. Handy for use in workplaces where the management are uptight squares who stifle free speech.
That chuffingcustomer is a clueless chuffer who doesn't know what the chuff he's on about.
To blaze, most commonly the chronic, but can also refer to the bomb tobacco.
I had just been involved in a rather large chuff session(the heady nuggets of course) on the booby bus when I grabbed a keystone to relieve my cottonmouth.