Short for instant favorite. Used when the option 'favorite' is available to show you like something.
"I was on DeviantArt the other day and found this awesome photograph, which was a total insta-fav in my opinion."
by TehShush March 10, 2009
insta-fav is a word describing something you instantly love and/or consider your favourite; it is a combination of 'instant' and 'favourite'. Pronounced "insta fave".
Dude! I totally insta-fav that shirt!
I'm insta-faving that picture you drew, it's so awesome
Cool shoes - insta-fav!
I'm insta-faving that picture you drew, it's so awesome
Cool shoes - insta-fav!
by The_Aliway. July 19, 2010