It means (the diarrhea) that your body is rejecting the toxins (Nicotine, etc)..
Ok, i've heard the "I smoke to lose weight weight" thing before. lol And, ummmmm.... If smoking kept people thin, why are there sooooo many overweight smokers out there? lol
If you want to smoke for whatever reason, that's your business. But, weight isn't a good reason. It just doesn't make any sense. lol
There are so many diets and fitness routines out there to help you lose weight..