Disgustingness 

Arousing revulsion or strong indignation.

Ew look at that pizza it’s disgustingness.

Disgustingness by YardKnowHowItBe March 12, 2018

Disgustingest 

A thing or a person which is even more disgusting and "most disgusting" doesn't do the trick.

Rajvir is the disgustingest person alivr

Disgustingest by Nitya6969 March 10, 2025