An older sibling who has social media and teaches you how to use it properly, or insists on you getting it so they can do so.
"Yo, my instagram teacher just taught me how to use a filter!"
"Man, I wish my older brother was an instagram teacher"
"Man, I wish my older brother was an instagram teacher"
by Xbox Live585856834563321111111 May 27, 2022
Get the Instagram Teachermug.