Drop (NickServ Command)
This command allows you to drop your NickServ registration. Note that once you issue this command, you cannot take it back. Your nickname, along with all of your ChanServ access entries, are automatically deleted from the database. All channels that you own are also automatically dropped as well unless you have named a successor for your channel and that user is under their channel registration limit.
If you are certain that you want to drop your nickname, then this argument takes 1 command, the nickname you wish to drop. IRC operators can drop any nickname they wish, but must refrain from doing so unless there are severe terms of service violations at play. To drop the nick nick1, you would use this command:
/msg NickServ drop nick1