the act of being a creeper
You are chatting with a creeper roommate from another room. You look down at the screen to see the words "I see you" and look behind you to see said roommate standing behind you with a very creepy expression on their face. "You are such a creeper" you say. They reply, "Indeed I am a creeper. But you're just jealous to be lacking in my illustrious creepitude. I've got mad skills and it takes a special kind of person to be able to pull off the act of creeping with finesse"
Creepiness, but with attitude
At first I thought he was just creepy, but there's something sexy about his creepitude.