possumitis 

the act of acting like a possum, or having possum-like symptoms

oh my gosh, sprouting a nude tail is a symptom of possumitis.

possumitis by foshiqua August 7, 2006

Possumility

A REAL FACT THAT IS ALIVE AND ALLOWED TO PLAY "DEAD."

There IS A POSSUMILITY THAT I DESPISE YOUR MOTHER.

Possumility by Systemglitch1967 December 17, 2018

Possumistic 

A combination of being both optimistic and pessimistic.

Why are you being so possumistic?

Possumistic by enealys April 2, 2021