Insta Nut 

To instantaneously ejactulate

Yo bro that pussy was so good I insta nut

Insta Nut by Swagmoneymillionare March 14, 2015

insta-nut 

Someone who is so incredibly sexy, that they make you instantaniously nut your self, otherwise known as an insta-nut

Damn, that girl was such an insta-nut

insta-nut by leeper September 4, 2008

Instanutt 

When you see a photo/person/object and instantly either cum inside your pants or make your panties wet

Linda saw a picture of Spongebob and instanutt right in her panties!!

Instanutt by @DarkDime November 4, 2019

Instanut 

Instanut (in-sta-nut) is the term used when someone or something is so aroused, usually by a person or situation that they would then instantaneously ejaculate or in other words "nut".

Example 1:

man 1- wow did you see Jessica's ass
man-2 - ya dude that was an instanut

Example 2:
That pornography was so hot that i instanuted

Instanut by PcProcrastinator May 26, 2018