throw[/<switch>] <object> throw[/<switch>] <exit>
The first form removes <object> from your inventory and puts it in your location, except for the following special cases: Dropping a STICKY thing sends it home, and dropping a thing in a room with a drop-to sends the thing to the drop-to location.
The second form removes <exit> from your list of exits and adds it to the list of exits for the current location. Anyone in the same location as you may then use the exit to travel to the exit's destination. You can only drop exits when you own the location where you are dropping them.
The following switch is recognized:
/quiet - Don't perform the @odrop/@adrop attributes on the dropped object. This switch only works if you control the object.
'drop' is the same as 'throw'.