Sounds like phlegm, which could indeed be a result from smoking.
Or an active lung infection. I had one for two entire years, and I only realised it was abnormal and that it was an infection the first day I didn't cough up any phlegm.
Nasty stuff.
Inferius Reviewed by Inferius on . What am I spitting? :p Well I was wondering, am I spitting yellow thick fluid because of me smoking too much? Usually that doesnt happen unless I'm sick and I'm not sick at all so this has to be the first time I..spit the stuff in the sink without being sick :(. Rating: 5