Lily Livered
Means cowardly. People once believed that your passions came from you liver. If you were lily livered your liver was white (because it did not contain any blood). So you were a coward.
Yellow Bellied
A plausible source is the medieval theory of medicine that assumed there were four humors (fluids) in the body. These determined the physical and mental condition of the person. If they got out of balance, you got sick or went crackers. The four humors were blood, phlegm, black bile and yellow bile. Yellow bile (choler from the Greek kholos for gall) made you peevish, choleric, irascible. The disease cholera got its name from the symptom of, ah, yellowish diarrhea. From there to yellow as symbol of jealousy and inconstancy was a pretty easy step.
...so...in your sympathetic epitaph...you are being overly redundant...
...& Gothika...that sux...