A
person who consistently performs the task of snibbing (locking) a door or
window and then proceeds to check that all doors and
windows are snibbed.
Person 1: What's PoppyDon doing?
Person 2: He is
checking if all
the doors are snibbed.
Person 1: Again?
Person 2:
Yes, that is why they call him PoppyDon the Snibber.