Do you mean Who am I chopped liver instead of chapped liver?

Very interesting to know the origin of this expression Don McIntosh. And I agree. This phrase signifies frustration. Thanks :)

Thanks Gord for the information. :)

I guess it`s because many people do not like liver, and chopped liver, even less. Actually, I found this explanation in Wikipedia: Since eating chopped liver may not be appreciated by everyone, the Jewish English expression "What am I, chopped liver?", signifies frustration or anger at being ignored on a social level. An alternative explanation for the etymology of the "What am I, chopped liver?" expression is that chopped liver was traditionally served as a side dish rather than a main course. The phrase, therefore may have originally meant to express a feeling of being overlooked, as a "side dish."

I think this expression is a bit old-fashioned. Also, it's usually "What am I, chopped liver?" rather than "Who am I..."