This is from Wiki. "Because of its unusual taste and gray appearance, it is an acquired taste and not a favorite or comfort food with everyone at the dinner table. This has given rise to the popular Jewish-American expression 'What am I, chopped liver?', signifying frustration or anger at being ignored on a social level. An alternate 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.'" http://en.wikipedia.org/wiki/Chopped_liver

from urban dictionary.com (I wasn't even gonna go near 'Portnoy's complaint'!!!) . chopped liver Someone perceived as being of little value or worth, as evidenced by being ignored when others are getting attention. Usually used as a semi-rhetorical question. Origin probably in American Jewish humor of the early-to-mid 20th century. "What am I, chopped liver?" "What do I look like, chopped liver?"

I have no idea, I loved Chopped Liver.. with lots of hard boiled egg and matzoh meal on a Ritz cracker. I think the expression should be "What am I - Parsley on Your Plate?"

I don't know, but when my son was little he heard it wrong and used to say ' what am I? .. a chocolate river?'

My guess would be the Bronx, N.Y. I have nothing base this on, it just sound very "Bronxy".

I've always heard that phrase, but never where it came from. this is what I found... http://www.everything2.com/index.pl?node_id=385190

What am I, chopped liver? (idea) by Segnbora-t (20.7 hr) (print) ? I like it! Fri Jan 21 2000 at 19:10:44 Expression used to lightly point out to someone else that they are forgetting or underestimating you. Apparently chopped liver is an insignificant thing to be. (thing) by amiawakeyet (4.2 y) (print) ? 1 C! I like it! Wed Aug 02 2000 at 19:10:02 Chopped liver insignificant? Oh-no-no! (Especially during the digestive process - Oy!) No - the reason chopped liver is used in the analogy (correct usage, "So? Vat am I? Chopped livah?," accompanied by half shrug) is that it is omnipresent*, therefore easily taken for granted. A subtle, but important difference. In correct usage the saying implies the sayer's sense of self-significance and conveys an appropriate load of guilt for one so thoughtless as to forget. The sayee is to infer that he/she is real schmuck for taking one so significant for granted. *Or was, in the old days, before The Most Expensively-Catered Bar Mitzvah Spread Wins (shhh - don't mention we got wholesale!) tradition got started. This is as close of an answer I could get. When I was with my boyfriend, he mentioned to me that this woman was pretty, etc.... and I said, so, what am I, chopped liver? I felt like he was taking me for granted, he could not see what was in front of him and that he was looking for that perfect woman, looks and body and not for what was inside of me.

Chopped liver: slang : one that is insignificant or not worth considering http://www.m-w.com/cgi-bin/dictionary?book=Dictionary&va=chopped+liver (idiomatic) A person or object which is not worthy of being noticed; someone or something insignificant. "What am I, chopped liver?". "Say, this new information is not chopped liver." http://en.wiktionary.org/wiki/chopped_liver Literally, chopped liver is a traditional Jewish dish, cooked chicken livers chopped or ground and seasoned, sometimes used as a sandwich filling. "What am I, chopped liver?" means "Don't dismiss me as if I were insignificant." I recently heard an explanation of this saying. Unfortunately, I don't remember where. It went like this: Chopped liver is always served as a side dish, never as a main dish. It therefore makes a good metaphor for someone who's being treated as unimportant or dispensable. http://www.phrases.org.uk/bulletin_board/16/messages/558.html

"Chopped liver" is considered a cheap food so it implies undesirability.

It's from the burlesque-era joke: The president of the shul is speaking to the congregation: "The congregation is like a festive meal. The rabbi is the roast, providing tasteful sustenence to all. The cantor is the warming chicken soup, making the repast harmonious. Our choir is the dessert, delighting one and all." The shamash mutters: "So what am I, chopped liver?"