If i smoke and eat a pizza and smoke again will i lose that weight?

If you do it for the next 35 years, but you won't like the side effects that come with it. Smoking is a poor habit to start and lung cancer is closely associated with it.

Hardly, but you will get Lung cancer or a heart-attack or possibly both. I lost my mother to lung cancer from smoking and I can tell you first-had that is no joy-ride for anyone. Do yourself a favor and never start smoking.