A derisive adjective used to describe a person who thinks they are in line with the counterculture movement but put their nose up at things that are different from their expectations. They are nice and friendly but not particularly interesting or interested in new ideas. Like dogs, they simply enjoy being part of a pack.
Shelly: "I am really into a guy with serious ance."
Gabby: "omg you are so weird"
and Shelly replied "well you're a norm-dog."