Instafat 

When you instantly put on weight, and can feel it right away, after eating really amazing, fattening food.

Man that turkey, mashed potatoes and gravy was so good, and the cake was even better, but i got instafat and need to unbutton my pants!

Instafat by KASECHRIST March 28, 2019

Instacation 

Noun.

An entire vacation spent taking and posting pictures on Instagram.

It looked like you had a great time on your instacation.

Instacation by Laurie H. August 4, 2017

InstaFAG 

Instagram + Faggot.
Used to call Instagram users.

Dude, you're an InstaFAG!

InstaFAG by cegeb April 12, 2013

instafake model 

A moderately attractive female who whores herself on Instagram for free, rather than professionally like a super model. Their profile will consist almost entirely of selfies and the occasional "seemingly" candid shot.

"For real tho she looks way better on IG"
"well yeah, all instafake models do."

instafake model by camelbakChute February 28, 2017

Instafart 

A powerful fart, immediately filling the room with a terrible smell.

We were riding in the car and my wife let out an Instafart making it hard to keep my eyes from watering.

Instafart by Willybeee August 16, 2014

Instafap 

A woman/man/shemale who in one glance makes you want to blow a load ASAP.

Rick: Dude, bombshell at 12 o'clock!
Ray: Christ! What an instafap!

Instafap by Supermundanae May 23, 2016

Instafamous

A person who's famous on the popular app Instagram because they have thousands of followers. Person is usually a pretty girl who posts a thousand pictures of her face or whatever food she's eating. May include pictures of other people's food

That girl's instafamous, she's got like 10k followers!

Instafamous by Big Daddy N September 25, 2012