invisible sandwich 

When someone has done a recreational substance that makes them move their jaw repeatedly as if eating a sandwich.

That dude has taken so much "X" that he looks like he's eating an invisible sandwich.

invisible sandwich by Cracka Ass Cracka September 29, 2012

invisible sandwich 

A picture or image of a person or animal with their hands raised toward their face (sometimes with their mouth open) and their fingers open and grasping the air.

Pic Caption: Invisible Sandwich!

invisible sandwich by Llama Llama Duck November 30, 2006