To burgle a house whilst the occupiers are present. This can be when the person is awake and in another room but is also applicable when the person is asleep in the room that is being burgled.
Smack heads often do creeps. As do people who steal high performance cars by creeping the keys.
I needed a fix so I did a creep on someone's house and stole their lap top from the kitchen table.
They had a Porsche parked outside so when they went upstairs I creeped the house and got the keys.