Expertness 

To be at a high level or degree in particular field.

Expert

In my expertness, I believe you are unqualified for a position at this firm.

Expertness by Rantrx February 7, 2018

Expertness 

Expertness: (noun)
Person who is

more knowledgeable than anyone else

"excuse me for being incorrect, your Expertness"

Expertness by Smithereen March 24, 2019

expertease 

noun: A girl who knows how to get what she wants, even though she is average looking.

Yolanda ain't as fly as Kristine, but some dude just bought her a Lexus 'cause she's an expertease.

expertease by professor951 April 9, 2011

Expertese 

The coded, obscure, and impenetrable language used among experts in a particular field, impossible to be understood by people not trained in that field.

"I didn't get a thing out of attending that seminar. The lectures were all in expertese."

Expertese by qpkarl January 3, 2019

expertess 

a female expert!

I refferred to the expertesses of the group when I needed a woman's opinion.

expertess by wordygal February 24, 2010