nicotine fit
A craving for a cig when you haven't had one, involves sweating, shaking, headache, tenseness, racing heart, high blood pressure and many others. It could be just one or two symptoms or more or even all of them. It is mostly mental as it goes away often before the first time.
Shit, bro, I run out of fags and am getting nicotine fit, u got a fag?