Person 1: Your have really been expertising your guitar skills with all of that practice.
Person 2: Thanks man, the hard work is really paying off.
Person 2: Thanks man, the hard work is really paying off.
by Stoolie May 21, 2014
Someone who has an expert opinion or is an expert on the matter. Their expertiseness is their expert opinion.
by kaigal February 9, 2010
A: Did you know Jimmy just joined the internet last night?
B: Wow, I wonder how long until he learns isolation expertise
A: What?
B: Wow, I wonder how long until he learns isolation expertise
A: What?
by whalecome March 1, 2021