A slight cough, feeling of general malaise or discontent developed when visiting a blue collar city or area. Akin to black lung but with fewer enduring after effects, usually remedied by leaving said city or area.
OMG, I went to a monster truck rally this weekend and developed a serious case of blue collar lung.
Or:
I ran out of gas and had to stay in a small town motel last weekend, the neighboring pulp mill almost gave me blue collar lung!