Top definition
When a person sees, a picture, statement, or video that has to be instantly shared with the rest of social media and/or the world.

Sharing something before you full comprehend it.
A picture of Nicolas Cage getting Falcon Punched....Instashare that

A sex tape of Selena Gomez, Mila Kunis, Maria Ozawa going at it, I dont have to see it to know this is an Instashare

The Republican Party says Barack Obama is the greatest man since Ronald Reagan?! INSTASHARE
by TheManipulator August 25, 2013
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