A nickname for Serinepth Sinderman, a character from Trials and Trebuchets. She was given this because she is brave in the face of danger, calling back to the Waffle House Disaster Index.
Wow, Serinepth Sinderman is the waffle house of people
People who are quite obviously too used to living in a private home, and tend to be noisy when at an appartment or hotel room.
*while in an appartment* Gah! Your friends are such House People! Don't they know that they're stomping on someones ceiling?
Don't put the music too loud, you can't do that in an appartment, we'll get a complaint. You're such a house person.