Throwing

Throwing is an action that can be performed in Minecraft PE. This counts as both 'throwing away' items, and actually throwing items.

Throwing Away
To throw away anything, the item must be in your inventory on the bottom of the screen. Then, simply tap and hold onto the item until the outline glows green and it will begin 'filling up' with green, and within a second or two, the item should be thrown away onto the ground. If you have multiple items, you can stop tapping while it is glowing and only a number of them will be cast away. It is useful for getting rid of items that are not neccessary and to make way for items that are more important. However, theyy can be picked up again.

To destroy them permanantly, one can throw them into Lava and they will be gone but it is reocmmended to simply build a Chest and put your unneeded items in there instead, as you never know when you may need them.

Throwing Items
Such items like Snowballs and Eggs can be thrown by tapping an area of the screen that is not close enough to be mined. The former will not damage mobs and will only serve to push them away, but the latter can damage mobs, and there is a chance of a baby Chicken hatching from the Egg. There is a chance that four baby Chickens are hatched from the Egg but it is very rare that this occurs.