Instabestie 

Someone who is almost every one of someone's Instagram pics. Like their bestie but is largely dipised by that person .An instabestie also taggs you and comments on every one of your pics.

Uuuh . My instabestie keeps texting and asking me if I want to hang out.

Instabestie by A_Lou_Lou_25 September 13, 2016

instavestigate 

the act of extensive research of a person and their life through the social media platform Instagram.

e.g. her new boyfriend seems really shady so I’ll have to instavestigate him.

instavestigate by honi.jones December 6, 2017