pickled liver 

The liver of a person whom drinks to excess.

He (she) has drank so much in their lifetime,they probably have a "Pickled Liver".

pickled liver by RTBSTRD November 4, 2013

pickeled liver 

When one comsumes so much alcohol that their liver actually becomes pickeled. Most commonly occurs after a weekend of heavy partying.

Johnny : I drank a lot this weekend
Shana : Do you have a pickeled liver?
Johnny : Well yeah I guess I..uh.., I pickeled my liver

pickeled liver by S. Murphy February 2, 2006