@ODROP 

@odrop <object> [=<message>]. The @odrop message, prefixed by the 
player's name, is shown to others when the object is dropped, in the 
case of things and players. For exits, it displays in the destination 
room before a player comes through.  For rooms, it is displayed when 
something is dropped in the room, with the object being the prefix 
instead of the player.  

<object> can be specified as <name> or #<number>, or as 'me' or 'here'. 

See also @DROP.