insta-expert 

noun: in conversation this person believes they are well versed in a topic or subject, when they actually don't know shiat.

"...and that's why"

"Good job, insta-expert."

insta-expert by Bob Dolemite May 29, 2007

Instaexpert

An individual who utilizes social media platforms and claims to be more knowledgeable on a topic then actual experts.

That guy is a real tool and an Instaexpert always posting on social media, but he's clueless!

Instaexpert by Uncas3 July 23, 2019