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a crazy awesome name of French decent, pronounced "East"
often mispronounced EX: icetray, istray
usually the last name
Istre by eysTre October 1, 2008
Related Words

istarlin 

Istarlin is a beautiful and GORGEOUS girl and a lot of guys like her but there too scared to tell here she very beautiful
Bro did you Istarlin today.
istarlin by Okur January 26, 2019

istartedit.com 

a term used for laying claim to the first iteration of an idea.
i dunno rory, im pretty sure ryan has the istartedit.com entry for the thin wallet craze.
istartedit.com by darius d August 16, 2010
New people or members who join chat rooms, lobby's or forums on the internet that have regular members. Makes you a instant regular chatter.

Instant Regular = Instareg
I see Mary is new to this chat site... that makes Mary an Instant Regular... Welcome aboard "Instareg" Mary!
instareg by Urban.Chatter May 30, 2010
A guy that you thought was a mistake but it turns out he was the perfect guy all along.

It turns out he is so caring and really makes you happy
"Damn I thought he was a mistake but it turns out he is an istake! I'm so happy!"
Istake by Dawg1994 November 24, 2016

Instarection 

When a male prematurely ejaculates BEFORE even becoming erect.
nerd: dude that hot girl just gave me an instarection! she didnt even touch my penis and i sprayed my load before i even got it up!
shane: ... you're a lil bitch
Instarection by Jake Seaton February 19, 2008