#tip is an extended command introduced in NetHack 3.6.0 that allows you to empty the contents of a container in your inventory or onto the floor. This is useful when you have no hands free, and you need to retrieve some curse removal item from your bag.
It will also allow you to drop a stashed scroll of scare monster with a single action.
Bear in mind that this acts exactly as if you had dropped all items in the selected container onto the floor, so if you are levitating, any fragile objects you drop will shatter upon impact.
Tipping over an icebox will render all the corpses unfit for sacrifice.