when somthing smells nebish it often refers to the putrid smell of neb. Nebbish smells often are caused by a constant lack of showers, deoderant, and body wask. Once you enherit the smell it is almost impossible to remove it off your body. It is the most powerful substance in the world. If smelt, it could be fatal for that person.
Mark: Hi Coleen.
Coleen: Hi Mark.
Mark: What is that horrible nebbish odor?
Coleen: What do you mean?
Mark: It smells like you had just baved in a 500,000 ton pile of horse shit. Must be Neb.