poutch
The opposite of "pinch", especially in reference to gestures on touch screen devices. Where a "pinching" motion is used to zoom in to an image on the device, the opposite "poutching" motion is used to zoom out. Derived from the fact that to "pinch" is to draw the fingers inwards, to "poutch" would be drawing the fingers outwards ("p-IN-ch" - "p-OUT-ch")
Pinch to zoom in on an image on a tablet, poutch to zoom out.