1) Fetor 2) Smelliness 1) The state of being rancid 
• (n.) The quality or state of being rancid; a rancid scent or flavor, as of old oil.
condition produced by aerial oxidation of unsaturated fat present in foods and other products, marked by unpleasant odour or flavour. When a fatty ... [1 related articles]
The state of being rancid. ... (05 Mar 2000) ... 
Process in which fats exposed to the air undergo oxidation and liquefy. Other reactions, such as hydrolysis, take place which result in the release of foul smelling free acids.
The oxidation of the natural oil in the fish, making the fish unpalatable.
Ran·cid'i·ty (răn*sĭd'ĭ*tȳ) noun [ Confer French rancidité .] The quality or state of being rancid; a rancid scent or flavor, as of old oil. Ure. 
Type: Term Pronunciation: ran-sid′i-tē Definitions: 1. The state of being rancid.
noun the state of being rancid; having a rancid scent or flavor (as of old cooking oil)