Instastar 

A person who has many followers or follower request on their Instagram account do to famousness, or inversely proportion of waist/chest size and amount of clothes.

Kim Kardashian is such a instastar, last night she posted som serious cleavage

Instastar by SmuttyKage April 4, 2015

Instastuck 

The inability to get off of Instagram.

Unable to close the Instagram App.
When one is stuck in his or her current physical state or location due to being on Instagram.

My husband has been instastuck for over an hour…can’t get him out of the bathroom because he is on Instagram.

Instastuck by Hipmomma January 23, 2023

Instascam 

Used to describe a party or gathering that looks awesome on Instagram but actually wasn't fun

Person A: "Did you see Jeff's rager on instagram? All those girls have to be hashtag naked by now"

Person B: "Dude it was an instascam. Everybody left at 9 and Jeff's jacking off to animal planet... Did you just say hashtag?

Instascam by urbandicktionary February 23, 2013

Instastalking

When you browse through someone's Instagram page for a period of time without liking or commenting on any of their photos or videos

Person A: Dude, have you seen Person C?! She is so hot!

Person B: Yeah, I know right, I spent like all of last night instastalking her.

Instastalking by DoubleM_2000 June 9, 2014

Instahard

For a male penis to go from a state of softness or relaxation to a state of an uncontrollable erection in the penis.
Mainly caused by a beautiful or attractive female when seen or spotted with the eyes.

A combination of the words: Instantly (Without Delay or Immediately) and Hard (Not easily penetrated).

"Man, I just got instahard when she walked in"

"Lola Luv = Instahard"

Instahard by Vinni-V February 16, 2010

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

instaswap 

Something alot of FaZe members do. Basically click Y pull out shock charge then hit Y again. (They are very easy)

YO DUDE I JUST HIT A 720 INSTASWAP ACROSS MAP!

instaswap by Mitey June 5, 2016