Would you be thinking of COPD, which is Chronic Obstructive Pulmonary Disease?
It is a condition which includes emphysema and chronic bronchitis. It's main trigger is history of smoking, and the term obstructive is used to reflect the fact that it does not repond to anti-inflammatory steroids in the same way that asthma (a reversible obstructive condition) does.
What would you like to know about the condition? Have you been diagnosed with this problem?